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A061178
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Third column (m=2) of triangle A060920 (bisection of Fibonacci triangle, even part).
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2
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1, 9, 51, 233, 942, 3522, 12473, 42447, 140109, 451441, 1426380, 4434420, 13599505, 41225349, 123723351, 368080793, 1086665562, 3186317718, 9286256393, 26916587307, 77634928209, 222920650081
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OFFSET
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0,2
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COMMENTS
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Numerator polynomial of g.f. is sum(A061176(3,m)*x^m,m=0..3).
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LINKS
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FORMULA
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G.f.: (1-x^3)/(1-3*x+x^2)^3.
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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