OFFSET
0,4
REFERENCES
F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 620.
LINKS
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
EXAMPLE
x^24 + 4048*x^15*y^9 + 61824*x^12*y^12 + 242880*x^9*y^15 + 198352*x^6*y^18 + 24288*x^3*y^21 + 48*y^24.
PROG
(Magma) C:=QRCode(GF(3), 23); D:=ExtendCode(C); W<x, y>:=WeightEnumerator(D); W;
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
STATUS
approved