A132848 - OEIS

%I #2 Mar 30 2012 18:37:05

%S 1,3,18,95,693,4893,40506,338277,3110310,29270549,294099936,

%T 3036380607,32913111931,366636699553,4245071555734,50447432122893,

%U 619067368928568,7783987091482635,100610823839282548,1330119345038208405

%N Column 2 of triangle A132845.

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

%o (PARI)

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

%K nonn

%O 0,2

%A _Paul D. Hanna_, Sep 17 2007