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Search: id:A081667
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| 1, 2, 8, 55, 610, 10946, 317811, 14930352, 1134903170, 139583862445, 27777890035288, 8944394323791464, 4660046610375530309, 3928413764606871165730, 5358359254990966640871840
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Diagonal of Fibonacci-Pascal triangle A045995
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FORMULA
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a(n)=sqrt(5)2^(-n(n+3)/2)(sqrt(5)+1)^((n^2+3n+2)/2)/10 + sqrt(5)2^(-n(n + 3)/2)(sqrt(5)-1)^((n^2+3n+ 2)/2)(-1)^(n(n+3)/2)/10
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MAPLE
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with(combinat): seq(fibonacci((n^2-n)/2), n=2..16); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 18 2008
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CROSSREFS
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Cf. A000045.
Sequence in context: A139016 A134954 A087422 this_sequence A117496 A117564 A023179
Adjacent sequences: A081664 A081665 A081666 this_sequence A081668 A081669 A081670
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Mar 26 2003
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