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A105689 Number of codes having highest minimal Euclidean norm of any Type 4^Z self-dual code of length n over Z/4Z. 2
1, 1, 1, 2, 2, 3, 4, 1, 11, 16, 19, 19, 66, 35, 28 (list; graph; refs; listen; history; text; internal format)



There are two versions of this sequence, this and A111263. I am not sure which is correct.


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

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

W. C. Huffman, On the classification and enumeration of self-dual codes, Finite Fields Applic., 11 (2005), 451-490.

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).


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

Cf. A105682 for minimal distance. See also A066012-A066017.

Sequence in context: A008951 A119473 A002122 * A187200 A117632 A236241

Adjacent sequences:  A105686 A105687 A105688 * A105690 A105691 A105692




N. J. A. Sloane, Dec 12 2001



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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)