Problems

1 – 12 of 12

Problem Title Likes Solvers Difficulty

Problem 45224. Wythoff Sequence

Created by: Asif Newaz

Tags number theory, sequence, oeis

Problem 2736. Pernicious Anniversary Problem

Created by: Jan Orwat

Tags easy, sequences, oeis

775

Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

Problem 45231. Generate Golomb's sequence

Created by: Asif Newaz

Tags sequence, oeis, golomb

Problem 42800. house of cards

Created by: Thomas Bischoff

Tags oeis, A005449

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

227

Problem 44360. Pentagonal Numbers

Created by: goc3

Tags series, number, sequence

616

Problem 2734. N-th Odious

Created by: Jan Orwat

Tags number theory, oeis, pop series

156

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

139

1 – 12 of 12

Difficulty Rating

Problem Groups

Difficulty Rating

Problem Groups

Problems

Problem 45224. Wythoff Sequence

Problem 2736. Pernicious Anniversary Problem

Problem 1298. P-smooth numbers

Problem 45231. Generate Golomb's sequence

Problem 42800. house of cards

Problem 2733. Evil Number

Problem 44360. Pentagonal Numbers

Problem 2734. N-th Odious

Problem 2595. Polite numbers. Politeness.

Problem 42355. Minimum Set (A+A)U(A*A) OEIS A263996

Problem 1886. Graceful Double Wheel Graph

Problem 1887. Graceful Graph: Wichmann Rulers