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%I #15 Mar 12 2022 21:41:15
%S 1,0,1,1,2,4,10,31
%N Number of indecomposable self-dual codes of length 2n over GF(4).
%H J. Conway, V. Pless, N. Sloane, <a href="https://doi.org/10.1109/TIT.1979.1056047">Self-dual codes over GF(3) and GF(4)of length not exceeding 16</a>, IEEE Trans. Information Theory 25 312-322 1979.
%H F. J. MacWilliams, A. M. Odlyzko, N. J. A. Sloane and H. N. Ward, <a href="https://doi.org/10.1016/0097-3165(78)90021-3">Self-Dual Codes over GF(4)</a>, J. Combin. Theory, A 25 288-318 1978.
%H E. M. Rains and N. J. A. Sloane, Self-dual codes, pp. 177-294 of Handbook of Coding Theory, Elsevier, 1998 (<a href="http://neilsloane.com/doc/self.txt">Abstract</a>, <a href="http://neilsloane.com/doc/self.pdf">pdf</a>, <a href="http://neilsloane.com/doc/self.ps">ps</a>).
%K nonn,hard,nice,more
%O 1,5
%A _N. J. A. Sloane_
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