40347919626
domain: N
Appears in sequences
- Fine's sequence (or Fine numbers): number of relations of valence >= 1 on an n-set; also number of ordered rooted trees with n nodes having root of even degree.at n=23A000957
- Generalized Catalan numbers C(-1; n).at n=23A064310
- Expansion of (1-2*x-sqrt(1-4*x))/(x^2 * (1+2*x+sqrt(1-4*x))).at n=20A104629
- A bisection of A000957.at n=11A138414