A113332 a(n) = A113129(2*n+2,n+2) for n>=0.

2, 10, 84, 930, 12452, 193284, 3393480, 66310914, 1425717060, 33435425100, 849342514200, 23235509430900, 681196753501992, 21309727555222600, 708630046700665104, 24964702239372310338, 928914855447585334020

Offset

0,1

Comments

Related to A000699, the number of irreducible diagrams with 2n nodes.

Links

Table of n, a(n) for n=0..16.

Formula

a(n) = A000699(n+1)*(2*n+3)*(n+2)/(3*(n+1)).

Crossrefs

Cf. A113129, A000699.

Sequence in context: A024491 A250117 A244627 * A321398 A180715 A107863

Adjacent sequences: A113329 A113330 A113331 * A113333 A113334 A113335

Keyword

nonn

Author

Philippe Deléham and Paul D. Hanna, Nov 03 2005

Status

approved