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A111266
Number of Type IV-II self-dual codes over F_2 + u*F_2 of length 4n.
0
1, 4, 14, 157
OFFSET
1,2
LINKS
W. C. Huffman, On the classification and enumeration of self-dual codes, Finite Fields Applic., 11 (2005), 451-490.
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
CROSSREFS
Sequence in context: A162077 A247526 A381248 * A098851 A080986 A132555
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 02 2005
STATUS
approved