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Search: id:A001647
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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
1
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OFFSET
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1,5
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REFERENCES
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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
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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
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Adjacent sequences: A001644 A001645 A001646 this_sequence A001648 A001649 A001650
Sequence in context: A005193 A101901 A124384 this_sequence A007177 A138415 A005268
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KEYWORD
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nonn,hard,nice
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AUTHOR
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njas
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