A111265 Number of strictly Type II self-dual codes over F_2 + u*F_2 of length 4n.

2, 10, 82, 1894

Offset

1,1

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: A112487 A089469 A281547 * A296667 A003093 A006679

Adjacent sequences: A111262 A111263 A111264 * A111266 A111267 A111268

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 02 2005

Status

approved