A061185 One half of sixth (m=5) column of triangle A060921 (bisection of Fibonacci triangle, odd part).

3, 49, 462, 3294, 19715, 104517, 506646, 2292310, 9817920, 40210800, 158677370, 606790410, 2258770689, 8214432303, 29269938510, 102434633406, 352793077413, 1197764971911, 4014411070092

Offset: 0

Author

Wolfdieter Lang, Apr 20 2001

Keywords

• nonn
• easy

Comments

Numerator polynomial of g.f. is sum(A061177(5,m)*x^m,m=0..5)/2.

Crossrefs

A061184.

Formula

a(n)= A060921(n+5, 5)/2.

G.f.: (3*(1-x^5)-5*(x-x^4)+3*(x^2-x^3))/(1-3*x+x^2)^6.