A061179 - OEIS

%I #3 Mar 31 2012 13:20:05

%S 1,14,105,594,2860,12402,49963,190570,696787,2463300,8472280,28481220,

%T 93914325,304597382,973877245,3075011478,9602753412,29695165110,

%U 91026167999,276833858530,835933445799,2507876305416

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

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

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

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

%Y A061178.

%K nonn,easy

%O 0,2

%A _Wolfdieter Lang_, Apr 20 2001