A105510 Number of indecomposable self-dual ternary codes of length 4n.

1, 0, 2, 4, 17

Offset

0,3

References

J. H. Conway, V. S. Pless and N. J. A. Sloane, Self-dual codes over GF(3) and GF(4) of length not exceeding 16, IEEE Trans. Inform. Theory, 25 (1979), 312-322.

J. S. Leon, V. S. Pless and N. J. A. Sloane, On ternary self-dual codes of length 24, IEEE Trans. Inform. Theory, 27 (1981), 176-180.

C. L. Mallows, V. S. Pless and N. J. A. Sloane, Self-dual codes over GF(3), SIAM J. Appl. Math. 31 (1976), 649-666.

Links

Table of n, a(n) for n=0..4.

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.

E. M. Rains and N. J. A. Sloane, Self-dual codes, pp. 177-294 of Handbook of Coding Theory, Elsevier, 1998 (Abstract, pdf, ps).

Crossrefs

Cf. A003178, A003179.

Sequence in context: A014221 A249760 A271552 * A155951 A208132 A254206

Adjacent sequences: A105507 A105508 A105509 * A105511 A105512 A105513

Keyword

nonn,nice,hard,more

Author

N. J. A. Sloane, May 07 2005

Status

approved