%I #6 Apr 15 2019 01:33:49
%S 0,0,1,3,12,26,95,907
%N Number of even formally self-dual (but not self-dual) binary codes of length 2n.
%H W. C. Huffman, <a href="https://doi.org/10.1016/j.ffa.2005.05.012">On the classification and enumeration of self-dual codes</a>, Finite Fields Applic., 11 (2005), 451-490.
%K nonn,more
%O 1,4
%A _N. J. A. Sloane_, Sep 19 2005
|