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Search: id:A143605
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| A143605 |
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Polynomial expansion sequence : p(x)=1 + x - x^5 + x^9 + x^10. |
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+0
1
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| 1, -1, 1, -1, 1, 0, -1, 2, -3, 3, -3, 2, 0, -3, 5, -7, 8, -7, 4, 1, -7, 13, -17, 19, -16, 8, 4, -18, 32, -42, 44, -36, 16, 13, -47, 79, -101, 103, -80, 31, 40, -121, 195, -241, 240, -178, 55, 117, -309, 478, -575
(list; graph; listen)
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OFFSET
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1,8
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FORMULA
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p(x)=1 + x - x^5 + x^9 + x^10; a(n)=expansion_coefficients(x^10*p(1/x)),
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MATHEMATICA
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f[x_] = 1 + x - x^5 + x^9 + x^10; g[x] = ExpandAll[x^10*f[1/x]]; a = Table[SeriesCoefficient[Series[1/g[x], {x, 0, 50}], n], {n, 0, 50}]
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CROSSREFS
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Sequence in context: A082239 A062745 A140733 this_sequence A098418 A128080 A062187
Adjacent sequences: A143602 A143603 A143604 this_sequence A143606 A143607 A143608
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KEYWORD
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sign
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Oct 26 2008
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