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Search: id:A081911
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| 1, 5, 26, 140, 775, 4375, 25000, 143750, 828125, 4765625, 27343750, 156250000, 888671875, 5029296875, 28320312500, 158691406250, 885009765625, 4913330078125, 27160644531250, 149536132812500, 820159912109375
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OFFSET
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0,2
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COMMENT
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Binomial transform of A081910 5th binomial transform of (1,0,1,0,0,0,.....). Case k=5 where a(n,k)=k^n(n^2-n+2k^2)/(2k^2) with G.f. (1-2kx+(k^2+1)x^2)/(1-kx)^3
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FORMULA
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a(n)=5^n(n^2-n+50)/50 G.f.: (1-10x+26x^2)/(1-5x)^3
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CROSSREFS
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Cf. A081912.
Sequence in context: A035029 A081569 A005573 this_sequence A081187 A104498 A045379
Adjacent sequences: A081908 A081909 A081910 this_sequence A081912 A081913 A081914
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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 31 2003
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