OFFSET
0,3
COMMENTS
Rescaled version of Molien series for self-dual Quebbemann codes over GF(4).
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 (1,1,0,-1,0,0,-1,0,1,1,-1).
FORMULA
a(n) ~ 1/90*n^3 + 1/15*n^2. - Ralf Stephan, Apr 29 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
G. Nebe, E. Rains, N. J. A. Sloane, Apr 05 2002
STATUS
approved