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Search: id:A143472
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| A143472 |
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A Salem polynomial gives the polynomial used to get this expansion sequence: p(x)=x^10 - x^7 - x^5 - x^3 + 1. |
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+0
1
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| 1, 0, 0, 1, 0, 1, 1, 1, 2, 1, 2, 3, 3, 4, 5, 6, 7, 9, 11, 14, 17, 20, 26, 31, 38, 48, 58, 72, 88, 108, 134
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OFFSET
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1,9
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COMMENT
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The ratio productive positive root is:1.2303914344072246
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FORMULA
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p(x)=x^10 - x^7 - x^5 - x^3 + 1; a(n)=Coefficient_Expansion(x^20*p(1/x)).
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MATHEMATICA
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f[x_] = x^10 - x^7 - x^5 - x^3 + 1; g[x] = ExpandAll[x^10*f[1/x]]; a = Table[SeriesCoefficient[Series[1/g[x], {x, 0, 30}], n], {n, 0, 30}]
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CROSSREFS
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Sequence in context: A138585 A070048 A116498 this_sequence A015739 A015746 A109266
Adjacent sequences: A143469 A143470 A143471 this_sequence A143473 A143474 A143475
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KEYWORD
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nonn,uned,probation
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AUTHOR
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Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com), Oct 24 2008
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