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A011892
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[ n(n-1)(n-2)/10 ].
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0
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0, 0, 0, 0, 2, 6, 12, 21, 33, 50, 72, 99, 132, 171, 218, 273, 336, 408, 489, 581, 684, 798, 924, 1062, 1214, 1380, 1560, 1755, 1965, 2192, 2436, 2697, 2976, 3273, 3590, 3927, 4284, 4662, 5061, 5483, 5928
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1,0,1,-3,3,-1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 15 2010]
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FORMULA
| a(n) = +3*a(n-1) -3*a(n-2) +a(n-3) +a(n-5) -3*a(n-6) +3*a(n-7) -a(n-8). G.f.: x^4*(x^3+2) / ( (-1+x)^4*(x^4+x^3+x^2+x+1) ). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 15 2010]
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CROSSREFS
| Sequence in context: A161203 A184637 A022450 * A062482 A046960 A126428
Adjacent sequences: A011889 A011890 A011891 * A011893 A011894 A011895
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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