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A087635
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a(n) = S(n,3) where S(n,m) = Sum_{k=0..n} binomial(n,k)*fibonacci(m*k).
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2
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0, 2, 12, 64, 336, 1760, 9216, 48256, 252672, 1323008, 6927360, 36272128, 189923328, 994451456, 5207015424, 27264286720, 142757658624, 747488804864, 3913902194688, 20493457948672, 107305138913280, 561857001684992
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 6*a(n-1)-4*a(n-2) = 2*A084326(n).
a(n) = Sum_{0<=j<=i<=n} C(i,j)*C(n,i)*Fibonacci(i+j). - Benoit Cloitre, May 21 2005
a(n) = Sum_{k=0..n} C(n,k)*Fibonacci(k)*Lucas(n-k). - Ross La Haye, Aug 14 2006
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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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