A111264 Number of strictly Type I self-dual codes over F_2 + u*F_2 of length n.

1, 2, 2, 3, 5, 13, 14, 34

Offset

1,2

Links

Table of n, a(n) for n=1..8.

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: A014644 A089541 A065843 * A065994 A152446 A265789

Adjacent sequences: A111261 A111262 A111263 * A111265 A111266 A111267

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 02 2005

Status

approved