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A028063
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Expansion of 1/((1-3x)(1-5x)(1-7x)(1-12x)).
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0
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1, 27, 478, 7086, 95923, 1234761, 15440896, 189849132, 2311064965, 27967760535, 337282318594, 4059193972938, 48793580278327, 586108780927749, 7037421345862372, 84477944245876104, 1013937929024363209
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OFFSET
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0,2
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LINKS
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FORMULA
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a(0)=1, a(1)=27, a(2)=478, a(3)=7086, a(n)=27*a(n-1)-251*a(n-2)+ 957*a(n-3)- 1260*a(n-4) [From Harvey P. Dale, Aug 31 2011]
a(n)=(8*12^(n+3)-9*7^(n+4)+18*5^(n+4)-35*3^(n+3))/2520. [Yahia Kahloune, Jun 08 2013]
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MATHEMATICA
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CoefficientList[Series[1/((1-3x)(1-5x)(1-7x)(1-12x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{27, -251, 957, -1260}, {1, 27, 478, 7086}, 20] (* Harvey P. Dale, Aug 31 2011 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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