A061179 Fourth column (m=3) of triangle A060920 (bisection of Fibonacci triangle, even part).

1, 14, 105, 594, 2860, 12402, 49963, 190570, 696787, 2463300, 8472280, 28481220, 93914325, 304597382, 973877245, 3075011478, 9602753412, 29695165110, 91026167999, 276833858530, 835933445799, 2507876305416

Offset: 0

Author

Wolfdieter Lang, Apr 20 2001

Keywords

• nonn
• easy

Comments

Numerator polynomial of g.f. is sum(A061176(4,m)*x^m,m=0..4).

Crossrefs

A061178.

Formula

a(n)= A060920(n+3, 3).

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