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A028203
Expansion of 1/((1-6x)(1-7x)(1-8x)(1-12x)).
0
1, 33, 691, 11757, 177835, 2499021, 33451867, 433216509, 5483226859, 68297761389, 841179979003, 10278678991581, 124904130163723, 1511929278991437, 18252066460636699, 219926530250218173
OFFSET
0,2
FORMULA
a(n) = 20*a(n-1) - 96*a(n-2) + 7^(n+1) - 6^(n+1), n >= 2. - Vincenzo Librandi, Mar 13 2011
a(n) = -8^(n+2) - 3*6^(n+1) + 6*12^(n+1)/5 + 7^(n+3)/5. - R. J. Mathar, Mar 14 2011
MATHEMATICA
CoefficientList[Series[1/((1-6x)(1-7x)(1-8x)(1-12x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{33, -398, 2088, -4032}, {1, 33, 691, 11757}, 20] (* Harvey P. Dale, Nov 09 2014 *)
CROSSREFS
Sequence in context: A028210 A028205 A028191 * A028187 A028186 A028158
KEYWORD
nonn
STATUS
approved