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Search: id:A122508
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| A122508 |
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G.f.: 1/[(1-2x)(1+2x+3x^2)]. |
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+0
1
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| 1, 0, 1, 6, 1, 12, 37, 18, 109, 240, 217, 894, 1657, 2196, 7021, 12138, 20197, 54264, 93025, 175446, 418609, 733596, 1471285, 3245250, 5872861, 12072960, 25344361, 47310126, 97782121, 199376292, 381642877, 786069018, 1577900629, 3075926280
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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G.f.=1/[x^3*p(1/x)], where p(x)=x^3-x-6
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LINKS
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Index entries for sequences related to linear recurrences with constant coefficients
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MAPLE
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G:=x/(1-2*x)/(1+2*x+3*x^2): Gser:=series(G, x=0, 41): seq(coeff(Gser, x, n), n=0..38);
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MATHEMATICA
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p[x_]=-6 - x + x^3 q[x_] = ExpandAll[x^3*p[1/x]] Table[ SeriesCoefficient[Series[x/q[x], {x, 0, 30}], n], {n, 0, 30}]
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CROSSREFS
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Sequence in context: A090850 A163945 A013613 this_sequence A062190 A080211 A146997
Adjacent sequences: A122505 A122506 A122507 this_sequence A122509 A122510 A122511
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KEYWORD
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nonn
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 15 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Oct 08 2006
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