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A021734 G.f.: 1/((1-x)(1-3x)(1-11x)(1-12x)). 0
1, 27, 502, 8022, 118363, 1663809, 22644784, 301210524, 3938740405, 50831269671, 649205557546, 8222000492706, 103410878533327, 1293146143620813, 16092125344053988, 199423591976817768 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n)=(80*12^(n+3) - 9*11^(n+4) + 55*3^(n+3) - 36)/7920. [Yahia Kahloune, Jun 27 2013]
MATHEMATICA
CoefficientList[Series[1/((1-x)(1-3x)(1-11x)(1-12x)), {x, 0, 20}], x] (* Harvey P. Dale, Mar 19 2011 *)
PROG
(PARI) a(n)=n+=3; (80*12^n-99*11^n+55*3^n-36)/7920 \\ Charles R Greathouse IV, Jun 27 2013
CROSSREFS
Sequence in context: A020724 A021994 A020568 * A019752 A001709 A016887
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 29 11:43 EDT 2024. Contains 371278 sequences. (Running on oeis4.)