18680
domain: N
Appears in sequences
- Expansion of a modular function.at n=21A006707
- Length of n-th term of A022482.at n=32A022483
- Starting positions of strings of three 9's in the decimal expansion of Pi.at n=16A083642
- Row sums of triangle defined in A113820.at n=22A160968
- Poincaré series for hyperbolic reflection group with Coxeter diagram o---o-(5)-o---o.at n=24A265044
- Numbers k such that 3*10^k + 13 is prime.at n=17A290473
- G.f.: Product_{n=-oo..+oo} (1 + x^n*(1 + x^n)^n).at n=24A293603
- Number of permutations p of [n] such that p(p(i)) = i for all i or p(n+1-p(i)) = n+1-i for all i.at n=10A297708
- Array read by antidiagonals: T(n,k) = number of noncrossing path sets on k*n nodes up to rotation with each path having exactly k nodes.at n=31A303864