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A025961
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Expansion of 1/((1-2x)(1-4x)(1-5x)(1-9x)).
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0
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1, 20, 263, 2902, 29289, 281472, 2630731, 24196634, 220500797, 1998686404, 18061169919, 162923877246, 1468215185425, 13223572329416, 119060866122227, 1071793518338338, 9647378871105573, 86832630229860108
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(0)=1, a(1)=20, a(2)=263, a(3)=2902, a(n)=20*a(n-1)-137*a(n-2)+ 382*a(n-3)- 360*a(n-4) [From Harvey P. Dale, Dec 08 2011]
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MATHEMATICA
| CoefficientList[Series[1/((1-2x)(1-4x)(1-5x)(1-9x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{20, -137, 382, -360}, {1, 20, 263, 2902}, 30] (* From Harvey P. Dale, Dec 08 2011 *)
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CROSSREFS
| Sequence in context: A041764 A022111 A025943 * A021854 A025939 A021824
Adjacent sequences: A025958 A025959 A025960 * A025962 A025963 A025964
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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