OFFSET
0,6
COMMENTS
x^23+1 factors mod 2 into (x+1)*f(x)*g(x).
REFERENCES
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, pp. 231.
LINKS
Index entries for linear recurrences with constant coefficients, signature (-1,0,0,0,-1,-1,-1,0,-1,0,-1).
FORMULA
O.g.f.: 1/(x^11+x^9+x^7+x^6+x^5+x+1). - Georg Fischer, Apr 18 2022
MATHEMATICA
f[x_] = 1 + x^2 + x^4 + x^5 + x^6 + x^10 + x^11;
g[x] = ExpandAll[x^11*f[1/x]];
a = Table[SeriesCoefficient[ Series[1/g[x], {x, 0, 50}], n], {n, 0, 50}]
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Roger L. Bagula, Mar 08 2009
EXTENSIONS
Edited by N. J. A. Sloane, Sep 04 2010
STATUS
approved