A066012 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 A105681.

2, 2, 2, 4, 2, 4, 4, 4, 2, 4, 4, 4, 4, 6, 6, 8, 6, 8, 6, 8, 8, 8, 10, 10

Offset

1,1

Links

Table of n, a(n) for n=1..24.

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. A066013 for number of codes. See also A066014-A066017.

Sequence in context: A152674 A072056 A356831 * A063375 A064129 A005137

Adjacent sequences: A066009 A066010 A066011 * A066013 A066014 A066015

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 11 2001

Status

approved