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A021074
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Expansion of 1/((1-x)(1-2x)(1-4x)(1-5x)).
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0
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1, 12, 95, 630, 3801, 21672, 119155, 639210, 3370301, 17549532, 90541815, 463889790, 2364180001, 11999840592, 60714998075, 306438236370, 1543644296901, 7764034206852, 39003422447935
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(0)=1, a(1)=12, a(2)=95, a(3)=630, a(n)=12*a(n-1)-49*a(n-2)+78*a(n-3)- 40*a(n-4) [From Harvey P. Dale, Oct 01 2011]
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MATHEMATICA
| CoefficientList[Series[1/((1-x)(1-2x)(1-4x)(1-5x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{12, -49, 78, -40}, {1, 12, 95, 630}, 30] (* From Harvey P. Dale, Oct 01 2011 *)
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CROSSREFS
| Sequence in context: A009647 A038836 A026860 * A027250 A194782 A059154
Adjacent sequences: A021071 A021072 A021073 * A021075 A021076 A021077
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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