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A066015 Number of codes having highest minimal Euclidean norm 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 A105682. 2
1, 1, 1, 2, 2, 3, 4, 6, 11, 16, 19, 19, 66, 35, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

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

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

S. T. Dougherty, M. Harada and P. Sole', Shadow Codes over Z_4, Finite Fields Applic., 7 (2001), 507-529.

P. Gaborit, Tables of Self-Dual Codes

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. A066014 for minimal weight. See also A066012-A066017.

Sequence in context: A032245 A013588 A108150 * A065482 A319638 A179637

Adjacent sequences:  A066012 A066013 A066014 * A066016 A066017 A066018

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 12 2001; revised May 06 2005

STATUS

approved

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Last modified October 19 22:00 EDT 2018. Contains 316378 sequences. (Running on oeis4.)