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A028346
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Expansion of 1/((1-x)^4*(1-x^2)^2).
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2
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1, 4, 12, 28, 58, 108, 188, 308, 483, 728, 1064, 1512, 2100, 2856, 3816, 5016, 6501, 8316, 10516, 13156, 16302, 20020, 24388, 29484, 35399, 42224, 50064, 59024, 69224, 80784, 93840, 108528, 125001, 143412
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Contribution from Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 14 2010: (Start)
Equals triangle A152205 as an infinite lower triangular matrix * the triangular
numbers: [1, 3, 6,...]. (End)
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FORMULA
| a(n) = (n+4)*(2*n^4+32*n^3+172*n^2+352*n+15*(-1)^n+225)/960. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 01 2010]
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CROSSREFS
| Cf. A152205 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 14 2010]
Sequence in context: A102650 A011939 A203286 * A079089 A182705 A186924
Adjacent sequences: A028343 A028344 A028345 * A028347 A028348 A028349
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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