20083

Appears in sequences

• Expansion of (1-3*x)/(1 - 4*x - x^2 + 3*x^3).at n=8A052926
• Numerators of the convergents to the continued fraction of Pi^2/6.at n=10A080016
• Sum of A037888(p) for all primes p such that 2^n < p < 2^(n+1).at n=15A095742
• Total number of parts that are not the smallest part in all partitions of n that do not contain 1 as a part.at n=37A195821
• Number of compositions of n such that the number of parts and the largest part and the smallest part are pairwise coprime.at n=15A199890
• Numbers n such that sigma(n^3) is the sum of two positive cubes.at n=40A281364
• Binary "cubes"; numbers whose binary representation consists of three consecutive identical blocks.at n=18A297405
• Numbers k such that phi(k) > phi(k+1) > phi(k+2) > phi(k+3) where phi is the Euler totient function (A000010).at n=33A326817