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A095685
Expansion of (1+x)^4/(1-11*x+11*x^2-x^3).
1
1, 15, 160, 1600, 15856, 156976, 1553920, 15382240, 152268496, 1507302736, 14920758880, 147700286080, 1462082101936, 14473120733296, 143269125231040, 1418218131577120, 14038912190540176, 138970903773824656, 1375670125547706400, 13617730351703239360
OFFSET
0,2
FORMULA
a(n) = 18*A072256(n)-2, n>1. - R. J. Mathar, Jan 11 2009
a(n) = -2+3*(5-2*sqrt(6))^n*(3+sqrt(6))-3*(-3+sqrt(6))*(5+2*sqrt(6))^n for n>1. - Colin Barker, Mar 05 2016
MATHEMATICA
CoefficientList[Series[(1 + x)^4/(1 - 11*x + 11*x^2 - x^3), {x, 0, 20}], x] (* Wesley Ivan Hurt, Dec 27 2023 *)
PROG
(PARI) Vec((1+x)^4/(1-11*x+11*x^2-x^3) + O(x^25)) \\ Colin Barker, Mar 05 2016
CROSSREFS
Cf. A072256.
Sequence in context: A206811 A027544 A021048 * A263514 A323292 A067361
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 04 2004
STATUS
approved