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Search: id:A135574
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| 0, 0, 3, 1, 11, 6, 42, 21, 171, 85, 683, 342, 2730, 1365, 10923, 5461, 43691, 21846, 174762, 87381, 699051, 349525, 2796203, 1398102, 11184810, 5592405, 44739243, 22369621, 178956971
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n+1)-2a(n) = A135575(n).
O.g.f.: -x^2*(3+2*x^2+x+3*x^3)/[(2*x-1)(x^2-x+1)(2*x+1)(x^2+x+1)] . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 31 2008
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CROSSREFS
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Adjacent sequences: A135571 A135572 A135573 this_sequence A135575 A135576 A135577
Sequence in context: A110165 A111965 A110440 this_sequence A008969 A119908 A002185
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KEYWORD
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nonn,easy,more
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Feb 24 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 31 2008
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