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A047786
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(9*n^4+4*n^3-n)/2.
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0
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0, 6, 87, 417, 1278, 3060, 6261, 11487, 19452, 30978, 46995, 68541, 96762, 132912, 178353, 234555, 303096, 385662, 484047, 600153, 735990, 893676, 1075437, 1283607, 1520628, 1789050, 2091531, 2430837, 2809842, 3231528
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| B. T. Bennett and R. B. Potts, Arrays and brooks, J. Austral. Math. Soc., 7 (1967), 23-31 (see p. 30).
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FORMULA
| O.g.f.: -3*x*(2+19*x+14*x^2+x^3)/(-1+x)^5 . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2008
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CROSSREFS
| Sequence in context: A091881 A004701 A177570 * A181271 A113666 A123544
Adjacent sequences: A047783 A047784 A047785 * A047787 A047788 A047789
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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