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A061182
Third column (m=2) of triangle A060921 (bisection of Fibonacci triangle, odd part).
2
3, 22, 111, 474, 1836, 6666, 23109, 77378, 252177, 804228, 2519640, 7777860, 23709783, 71501422, 213619683, 633011454, 1862264196, 5443487406, 15820188729, 45739697306, 131624104677, 377157259848
OFFSET
0,1
COMMENTS
Numerator polynomial is sum(A061177(2,m)*x^m,m=0..2).
FORMULA
a(n)= A060921(n+2, 2).
G.f.: (3*(1+x^2)-5*x)/(1-3*x+x^2)^3.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Apr 20 2001
STATUS
approved