A060558 Fifth column (m=4) of triangle A060556.

5, 55, 316, 1284, 4170, 11550, 28380, 63492, 131703, 256685, 474760, 839800, 1429428, 2352732, 3759720, 5852760, 8900265, 13252899, 19362596, 27804700, 39303550, 54761850, 75294180, 102265020

Offset: 0

Author

Wolfdieter Lang, Apr 06 2001

Keywords

• nonn
• easy

Links

• Harry J. Smith, Table of n, a(n) for n = 0..500

Crossrefs

Cf. A000217, A004320, A040977.

Programs

PARI

a(n)={(2*n^2 + 18*n + 35)*binomial(n + 6, 6)/7} \\ Harry J. Smith, Jul 07 2009

Formula

a(n) = (2*n^2 + 18*n + 35)*binomial(n+6, 6)/7.

G.f.: (5 + 10*x + x^2)/(1-x)^9.