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Search: id:A119429
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| A119429 |
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Expansion of sum{k>=0, x^(2k)/prod[j=1..k, 1-j*2x]}. |
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+0
2
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| 1, 0, 1, 2, 5, 14, 45, 164, 661, 2884, 13461, 66894, 353217, 1977146, 11691481, 72734088, 474172777, 3229062120, 22914397417, 169128976922, 1296276808253, 10300677006854, 84731125615749, 720392483485868, 6321631421441149
(list; graph; listen)
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OFFSET
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0,4
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FORMULA
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a(n)=sum{k=0..n, S2(k,n-k)2^(2k-n)}, S2(n,k)=A048993(n,k); a(n)=sum{k=0..floor(n/2), S2(n-k,k)2^(n-2k)}.
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CROSSREFS
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Cf. A024427.
Sequence in context: A149893 A149894 A081444 this_sequence A059216 A007823 A006391
Adjacent sequences: A119426 A119427 A119428 this_sequence A119430 A119431 A119432
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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), May 19 2006
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