A066013 Number of codes having highest minimal Lee distance of any Type 4^Z self-dual code of length n over Z/4Z which does not have all Euclidean norms divisible by 8, that is, is strictly Type I. Compare A105688.

1, 1, 1, 1, 2, 1, 1, 3, 11, 5, 3, 39, 8, 1, 15

Offset

1,5

Links

Table of n, a(n) for n=1..15.

S. T. Dougherty, M. Harada and P. Solé, Shadow Codes over Z_4, Finite Fields Applic., 7 (2001), 507-529.

P. Gaborit, Tables of Self-Dual Codes

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. A105674, A105675, A105676, A105677, A105678, A016729, A066016, A105681, A105682.

Cf. A066012 for minimal Lee distances of these codes. See also A066014-A066017.

Sequence in context: A337219 A220898 A336163 * A212261 A014521 A084389

Adjacent sequences: A066010 A066011 A066012 * A066014 A066015 A066016

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 11 2001; revised May 06 2005

Status

approved