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A001647
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Number of indecomposable self-dual codes of length 2n over GF(4).
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0
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OFFSET
| 1,5
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REFERENCES
| Conway, Pless, Sloane, Self-Dual Codes ..., IEEE Trans. Information Theory 25 312-322 1979.
F. J. MacWilliams, A. M. Odlyzko, N. J. A. Sloane and H. N. Ward, Self-Dual Codes over GF(4), J. Combin. Theory, A 25 288-318 1978.
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LINKS
| E. M. Rains and N. J. A. Sloane, Self-dual codes, pp. 177-294 of Handbook of Coding Theory, Elsevier, 1998 (Abstract, pdf, ps).
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CROSSREFS
| Sequence in context: A173940 A101901 A124384 * A007177 A138415 A005268
Adjacent sequences: A001644 A001645 A001646 * A001648 A001649 A001650
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KEYWORD
| nonn,hard,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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