A132848 Column 2 of triangle A132845.

1, 3, 18, 95, 693, 4893, 40506, 338277, 3110310, 29270549, 294099936, 3036380607, 32913111931, 366636699553, 4245071555734, 50447432122893, 619067368928568, 7783987091482635, 100610823839282548, 1330119345038208405

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Formula

a(n) = A132844(2n+2,2) = A132844(2n+3,2).

Prog

(PARI)

Crossrefs

Cf. triangles: A132845, A132844; other columns: A132846, A132847, A132849.

Sequence in context: A125833 A129547 A081151 * A321032 A180036 A038158

Adjacent sequences: A132845 A132846 A132847 * A132849 A132850 A132851

Keyword

nonn

Author

Paul D. Hanna, Sep 17 2007

Status

approved