# Problems

1 – 50 of 55
 Problem Title Likes Solvers Difficulty

#### Problem 57422. Harmonic series counting

Created by: Roie Knaanie

Tags math, sequences

0

10

#### Problem 44225. Sum of self power series

Created by: MathReallyWorks

2

71

#### Problem 55195. Sequence

Created by: Philena

Tags sequences

1

24

#### Problem 54675. Define an arithmetic sequence

Created by: Ashley Barnes

1

20

#### Problem 42581. Create sequnce 1 4 9 16 25.........

Created by: Azhar

3

250

#### Problem 44466. The twelve days of Christmas

Created by: David Verrelli

1

36

Created by: HH

3

25

#### Problem 1893. GJam 2014 China Rd A: Library Sorting (Small)

Created by: Richard Zapor

1

25

Created by: G K

2

52

#### Problem 1132. Create a recurrence matrix for a vector of data

Created by: Alex Feinman

Tags sequences

2

20

#### Problem 56260. Leonardo primes

Created by: Lenka Hanakova

3

14

#### Problem 566. Sum of first n terms of a harmonic progression

Created by: Srivardhini

3

357

#### Problem 2736. Pernicious Anniversary Problem

Created by: Jan Orwat

12

784

#### Problem 52594. Easy Sequences 10: Sum of Cumsums of Fibonacci Sequence

Created by: Ramon Villamangca

2

23

#### Problem 46676. List the erauqs

Created by: ChrisR

1

17

#### Problem 46624. List the emirps

Created by: ChrisR

2

36

Created by: G K

3

21

#### Problem 1894. GJam 2014 China Rd A: Library Sorting (Large)

Created by: Richard Zapor

1

19

Created by: JD

1

19

Created by: HH

Tags sequences

2

22

#### Problem 46615. Find terms in the Connell sequence

Created by: ChrisR

Tags sequences

2

25

#### Problem 44523. Pattern Sum

Created by: Dishant Varshney

2

194

#### Problem 52462. Easy Sequences 1: Find the index of an element

Created by: Ramon Villamangca

1

39

#### Problem 53004. Collect a set of candy wrappers

Created by: ChrisR

1

3

#### Problem 52584. Easy Sequences 9: Faithful Pairs

Created by: Ramon Villamangca

1

15

#### Problem 44628. The other half of the Fibonacci sequence

Created by: David Verrelli

2

15

#### Problem 52689. Easy Sequences 18: Set Bits of Triple Summations

Created by: Ramon Villamangca

2

6

#### Problem 594. "Look and say" sequence

Created by: Alex Feinman

2

184

#### Problem 12. Fibonacci sequence

Created by: Cody Team

95

11886

#### Problem 52654. Easy Sequences 13: Average Speed of Spaceship

Created by: Ramon Villamangca

1

10

#### Problem 47833. List the delete-a-digit primes

Created by: ChrisR

3

16

#### Problem 52497. Easy Sequences 3: Prime 44-number Squares

Created by: Ramon Villamangca

1

23

#### Problem 1779. Oh Zero Zero Zero!!!

Created by: Chris E.

12

305

#### Problem 1696. Morse Code Generator! Try it!

Created by: Chris E.

2

61

#### Problem 2329. Finding the next number in a number list, are you able to crack it!

Created by: Chris E.

1

12

Created by: HH

2

16

Created by: CXD

Tags sequences

0

5

#### Problem 49803. Compute expulsions from the Kimberling shuffle

Created by: ChrisR

Tags sequences

1

6

#### Problem 51282. Compute a row of the Kimberling shuffle

Created by: ChrisR

Tags sequences

1

6

#### Problem 56220. Easy Sequences 75: Easy as Pisano Pi

Created by: Ramon Villamangca

1

7

#### Problem 52532. Easy Sequences 5: Project Euler Problem 1 - Again!

Created by: Ramon Villamangca

2

7

#### Problem 54. Maximum running product for a string of numbers

Created by: Cody Team

7

1713

#### Problem 2640. Find similar sequences

Created by: Guillaume

Tags sequences

1

82

#### Problem 52562. Easy Sequences 6: Coefficient sums of derivatives

Created by: Ramon Villamangca

1

10

#### Problem 52609. Easy Sequences 11: Factorial Digits without Trailing Zeros

Created by: Ramon Villamangca

1

11

#### Problem 8057. (Linear) Recurrence Equations - Generalised Fibonacci-like sequences

Created by: Jan Orwat

13

251

#### Problem 52574. Easy Sequences 8: Triangles with integer sides and prime perimeters

Created by: Ramon Villamangca

1

7

#### Problem 52614. Easy Sequences 12: 50th Prime

Created by: Ramon Villamangca

0

11

#### Problem 317. Find the stride of the longest skip sequence

Created by: Ned Gulley

Tags sequences

9

134

#### Problem 52634. Easy Sequences 14: Consecutive Composites

Created by: Ramon Villamangca

1

4

1 – 50 of 55