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A110306 Number of inequivalent (indecomposable or decomposable) self-dual codes of Type {4^H+}_II and length 2n. 3
1, 1, 2, 6, 21, 128, 3079 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..6.

L. E. Danielsen and M. G. Parker, On the classification of all self-dual additive codes over GF(4) of length up to 12, arXiv:math/0504522 [math.CO], 2005-2006.

L. E. Danielsen and M. G. Parker, On the classification of all self-dual additive codes over GF(4) of length up to 12, J. Combin. Theory A 113 (7) (2006) 1351-1367.

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

W. C. Huffman, Additive self-dual codes over F_4 with an automorphism of odd prime order, Adv. Math. Commun., 1 (2007), 357-398.

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

CROSSREFS

Cf. A090899, A094927, A110302.

Sequence in context: A126060 A266934 A182157 * A028936 A066932 A181754

Adjacent sequences:  A110303 A110304 A110305 * A110307 A110308 A110309

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Sep 09 2005

STATUS

approved

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Last modified July 31 15:10 EDT 2021. Contains 346374 sequences. (Running on oeis4.)