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A028220
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Expansion of 1/((1-7x)(1-8x)(1-9x)(1-11x)).
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0
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1, 35, 770, 13630, 212331, 3041745, 41087740, 531634460, 6658867061, 81336796255, 974120693910, 11484949238490, 133713902876191, 1540987906351565, 17612518552867280, 199940810374681720, 2257196040059471721, 25366166559007515675, 283993639507153095850
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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(n) = (11^(n+3)-6*9^(n+3)+8^(n+4)-3*7^(n+3))/24. - Yahia Kahloune, Jun 12 2013
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MATHEMATICA
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CoefficientList[Series[1/((1-7x)(1-8x)(1-9x)(1-11x)), {x, 0, 20}], x] (* Harvey P. Dale, May 17 2020 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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