A116869 Sixth column of triangle A028364.

132, 297, 869, 2739, 8986, 30275, 104006, 362738, 1280592, 4566642, 16423581, 59497075, 216901454, 795117015, 2929034130, 10837075830, 40253156520, 150045410430, 561097823490, 2104382963214, 7913603390196

Offset: 0

Author

Wolfdieter Lang, Mar 24 2006

Keywords

• nonn
• easy

Comments

Also sixth diagonal of triangle A067323.

Crossrefs

Cf. A067296 (fifth column).

Formula

a(n)= A028364(n+5,5) = sum(C(k)*C(n+5-k),k=0..5), with the Catalan numbers C(n):=A000108(n).

G.f.: (c5(x)*c(x)-(c5(x)-1)/x)/x^5, with c5(x) := sum(C(k)*x^k, k=0..5) and c(x) is the g.f. for the Catalan numbers A000108.