A111266 Number of Type IV-II self-dual codes over F_2 + u*F_2 of length 4n.

1, 4, 14, 157

Offset

1,2

Links

Table of n, a(n) for n=1..4.

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

Adjacent sequences: A111263 A111264 A111265 * A111267 A111268 A111269

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 02 2005

Status

approved