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A132848
Column 2 of triangle A132845.
5
1, 3, 18, 95, 693, 4893, 40506, 338277, 3110310, 29270549, 294099936, 3036380607, 32913111931, 366636699553, 4245071555734, 50447432122893, 619067368928568, 7783987091482635, 100610823839282548, 1330119345038208405
OFFSET
0,2
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
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Sep 17 2007
STATUS
approved