31569
domain: N
Appears in sequences
- Related to Gilbreath conjecture.at n=30A001549
- McKay-Thompson series of class 12C for the Monster group.at n=14A058206
- a(n+1) = a(n)-th composite and a(1) = 13.at n=40A059408
- G.f.: A(x) = A_1 where A_1 = 1/[1 - x*(A_2)^2], A_2 = 1/[1 - x^2*(A_3)^2], A_3 = 1/[1 - x^3*(A_4)^2], ... A_n = 1/[1 - x^n*(A_{n+1})^2] for n>=1.at n=16A132332
- Number of binary strings of length n with no substrings equal to 000 or 011.at n=32A164315
- Expansion of x*(1+x+x^2) / ( (x-1)*(x^3+x^2-1) ).at n=32A171861
- Number of Dyck paths of length 2n with exactly 2 hills.at n=12A294527