OFFSET
0,7
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 237
Index entries for linear recurrences with constant coefficients, signature (0,0,1,1,1,1,-1,-1,-2,-1,-1,1,1,1,1,0,0,-1).
MAPLE
seq(coeff(series(1/mul(1-x^j, j=3..6), x, n+1), x, n), n = 0..80); # G. C. Greubel, Sep 09 2019
MATHEMATICA
CoefficientList[Series[1/((1-x^3)(1-x^4)(1-x^5)(1-x^6)), {x, 0, 80}], x] (* Vincenzo Librandi, Jun 23 2013 *)
PROG
(PARI) my(x='x+O('x^80)); Vec(1/prod(j=3, 6, 1-x^j)) \\ G. C. Greubel, Sep 09 2019
(Magma) R<x>:=PowerSeriesRing(Integers(), 80); Coefficients(R!( 1/&*[1-x^j: j in [3..6]] )); // G. C. Greubel, Sep 09 2019
(Sage)
def A008681_list(prec):
P.<x> = PowerSeriesRing(ZZ, prec)
return P(1/prod(1-x^j for j in (3..6))).list()
A008681_list(80) # G. C. Greubel, Sep 09 2019
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Typo in name fixed by Vincenzo Librandi, Jun 23 2013
STATUS
approved