70715340
domain: N
Appears in sequences
- Dirichlet convolution of Catalan numbers with themselves.at n=16A034768
- Composite binary rooted trees with external nodes.at n=32A035102
- Third diagonal of array in A059347.at n=31A059348
- Expansion of (1 + x*C)*C, where C = (1 - (1 - 4*x)^(1/2))/(2*x) is the g.f. for Catalan numbers, A000108.at n=16A068875
- Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A089864.at n=34A089408
- Expansion of exp( arcsinh( -2*x ) ) in powers of x.at n=34A104624
- Self-convolution of repeated Catalan numbers.at n=31A104722
- Expansion of exp( arcsinh( 2*x ) ).at n=34A182122
- The number of boundary twigs for complete binary twigs. A twig is a vertex with one edge on the boundary and only one other descendant.at n=15A228403
- a(n) = A241477(n, n).at n=34A241543
- Certain directed lattice paths.at n=8A260775
- Number of rooted asymmetrical polyenoids of type U_n* having n edges.at n=16A262543
- a(-1)=-1; a(n) = 2*A000108(n) for n >= 0.at n=17A284016