A025801 Expansion of 1/((1-x^2)*(1-x^3)*(1-x^12)).

1, 0, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 4, 2, 4, 4, 4, 4, 6, 4, 6, 6, 6, 6, 9, 6, 9, 9, 9, 9, 12, 9, 12, 12, 12, 12, 16, 12, 16, 16, 16, 16, 20, 16, 20, 20, 20, 20, 25, 20, 25, 25, 25, 25, 30, 25, 30, 30, 30, 30, 36, 30, 36, 36, 36

Offset

0,7

Links

Table of n, a(n) for n=0..64.

Index entries for linear recurrences with constant coefficients, signature (0,1,1,0,-1,0,0,0,0,0,0,1,0,-1,-1,0,1).

Mathematica

CoefficientList[Series[1/((1-x^2)(1-x^3)(1-x^12)), {x, 0, 80}], x] (* or *) LinearRecurrence[{0, 1, 1, 0, -1, 0, 0, 0, 0, 0, 0, 1, 0, -1, -1, 0, 1}, {1, 0, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 4, 2, 4, 4, 4}, 80] (* Harvey P. Dale, Apr 30 2018 *)

Prog

(PARI) Vec(1/((1-x^2)*(1-x^3)*(1-x^12)) + O(x^75)) \\ Jinyuan Wang, Feb 28 2020

Crossrefs

Sequence in context: A010554 A062610 A351593 * A060548 A140426 A146879

Adjacent sequences: A025798 A025799 A025800 * A025802 A025803 A025804

Keyword

nonn

Author

N. J. A. Sloane

Status

approved