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A110861
Number of even isodual (but not self-dual) binary codes of length 2n.
0
0, 0, 1, 3, 8, 20, 67, 331
OFFSET
1,4
LINKS
W. C. Huffman, On the classification and enumeration of self-dual codes, Finite Fields Applic., 11 (2005), 451-490.
CROSSREFS
Sequence in context: A302674 A108189 A148768 * A027320 A027319 A297973
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 19 2005
STATUS
approved