A152809 - OEIS

%I #2 Mar 30 2012 18:37:15

%S 1,1,5,15,49,180,685,2748,11683,52262,245357,1207538,6217803,33428738,

%T 187323142,1092328063,6618105311,41600580908,270931087106,

%U 1825820975565,12716770294407,91437668751232,678020392413506,5179601279549207

%N Column 4 of triangle A152798; a(n) = A152798(n+4,4).

%F a(n) = A152798(n+3,4) + 4*A152798(n+3,5) + 6*A152798(n+3,6) + 4*A152798(n+3,7) + A152798(n+3,8) for n>0 with a(0)=1.

%Y Cf. A152798; A122889, A152799, A152808.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Jan 01 2009