login
Third column (m=2) of triangle A060920 (bisection of Fibonacci triangle, even part).
2

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

%S 1,9,51,233,942,3522,12473,42447,140109,451441,1426380,4434420,

%T 13599505,41225349,123723351,368080793,1086665562,3186317718,

%U 9286256393,26916587307,77634928209,222920650081

%N Third column (m=2) of triangle A060920 (bisection of Fibonacci triangle, even part).

%C Numerator polynomial of g.f. is sum(A061176(3,m)*x^m,m=0..3).

%F a(n)= A060920(n+2, 2).

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

%Y A001519, A054444.

%K nonn,easy

%O 0,2

%A _Wolfdieter Lang_, Apr 20 2001