OFFSET
0,13
COMMENTS
Harmonic Molien series for real Clifford group C_2 of order 2304 is (1+x^18)/((1-x^8)(1-x^12)(1-x^24)).
LINKS
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
Index entries for linear recurrences with constant coefficients, signature (0, 0, 1, 1, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, -1, -1, 0, 0, 1).
FORMULA
a(n) ~ 1/288*n^2. - Ralf Stephan, Apr 29 2014
G.f.: ( -1-x^6+x^3 ) / ( (1+x^2-x)*(x^4-x^2+1)*(1+x)^2*(1+x+x^2)^2*(x^2+1)^2*(x-1)^3 ). - R. J. Mathar, Dec 18 2014
PROG
(PARI) Vec((1+x^9)/((1-x^4)*(1-x^6)*(1-x^12)) + O(x^80)) \\ Jinyuan Wang, Mar 10 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 05 2004
STATUS
approved