219542400
domain: N
Appears in sequences
- a(1) = 1; a(n) = n * Sum_{k=1..n-1} a(k).at n=10A074143
- Number of endofunctions on [n] where the smallest cycle length equals 9.at n=2A246196
- Number of endofunctions on [n] whose cycle lengths are multiples of 9.at n=11A246616
- Expansion of e.g.f. (1 - x^2)^(-x).at n=12A353226
- Expansion of e.g.f. 1 / (exp(x^3) - x).at n=11A375609
- E.g.f. satisfies A(x) = exp( x^3*A(x)^3 * (1 + x*A(x)) ).at n=10A376477
- E.g.f. A(x) satisfies A(x) = 1 - x*A(x) * log(1 - x^3*A(x)^3).at n=11A392938