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A028198
Expansion of 1/((1-5x)(1-9x)(1-11x)(1-12x)).
0
1, 37, 870, 16610, 281171, 4403367, 65339080, 932218420, 12912631941, 174806957897, 2323925673290, 30446318392230, 394142295428311, 5052076439311627, 64222440261259500, 810705252920074040
OFFSET
0,2
FORMULA
a(n) = 23*a(n-1) - 132*a(n-2) + (9^(n+1) - 5^(n+1))/4, n >= 2. - Vincenzo Librandi, Mar 12 2011
a(n) = 4*12^(n+2)/7 - 5^(n+3)/168 - 11^(n+3)/12 + 3*9^(n+2)/8. - R. J. Mathar, Mar 18 2011
MATHEMATICA
CoefficientList[Series[1/((1-5x)(1-9x)(1-11x)(1-12x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{37, -499, 2883, -5940}, {1, 37, 870, 16610}, 20] (* Harvey P. Dale, Feb 06 2017 *)
CROSSREFS
Sequence in context: A028223 A028217 A028215 * A028164 A159090 A159109
KEYWORD
nonn
STATUS
approved