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A028220
Expansion of 1/((1-7x)(1-8x)(1-9x)(1-11x)).
0
1, 35, 770, 13630, 212331, 3041745, 41087740, 531634460, 6658867061, 81336796255, 974120693910, 11484949238490, 133713902876191, 1540987906351565, 17612518552867280, 199940810374681720, 2257196040059471721, 25366166559007515675, 283993639507153095850
OFFSET
0,2
FORMULA
a(n) = (11^(n+3)-6*9^(n+3)+8^(n+4)-3*7^(n+3))/24. - Yahia Kahloune, Jun 12 2013
MATHEMATICA
CoefficientList[Series[1/((1-7x)(1-8x)(1-9x)(1-11x)), {x, 0, 20}], x] (* Harvey P. Dale, May 17 2020 *)
CROSSREFS
Sequence in context: A326865 A139641 A240928 * A334909 A028213 A028212
KEYWORD
nonn
AUTHOR
STATUS
approved