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Search: id:A061159
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| A061159 |
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Numerators in expansion of Euler transform of b(n)=1/2. |
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+0
3
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| 1, 1, 7, 17, 203, 455, 2723, 6001, 133107, 312011, 1613529, 3705303, 39159519, 88466147, 443939867, 1041952049, 40842931395, 93889422323, 460998957853, 1054706036923, 10194929714949, 23513104814105, 111438617932133
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Denominators of c(n) are 2^d(n), where d(n)=power of 2 in (2n)!, cf. A005187.
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LINKS
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N. J. A. Sloane, Transforms
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FORMULA
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Numerators of c(n), where c(n)=1/(2*n)*Sum_{k=1..n} c(n-k)*sigma(k), n>0, c(0)=1.
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CROSSREFS
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Cf. A000712, A061160, A061161.
Sequence in context: A165246 A118108 A147643 this_sequence A140122 A092240 A110120
Adjacent sequences: A061156 A061157 A061158 this_sequence A061160 A061161 A061162
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 17 2001
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