A061181 Sixth column (m=5) of triangle A060920 (bisection of Fibonacci triangle, even part).

1, 27, 315, 2534, 16407, 91959, 464723, 2171850, 9546570, 39940460, 160437690, 622844730, 2348773525, 8638447293, 31086197469, 109744786482, 380920122009, 1302304276665, 4392297900647

Offset

0,2

Comments

Numerator polynomial of g.f. is sum(A061176(6,m)*x^m,m=0..6).

Links

Table of n, a(n) for n=0..18.

Formula

a(n)= A060920(n+5, 5).

G.f.: ((1+x^6)+9*(x+x^5)-30*(x^2+x^4)+41*x^3)/(1-3*x+x^2)^6.

Crossrefs

A061180.

Sequence in context: A125415 A119295 A048396 * A231911 A182130 A224311

Adjacent sequences: A061178 A061179 A061180 * A061182 A061183 A061184

Keyword

nonn,easy

Author

Wolfdieter Lang, Apr 20 2001

Status

approved