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A106158 Number of Type 4^E Euclidean self-dual codes over GF(4) of length 2n, excluding those of Type 4^E_{II}. 1
1, 1, 3, 6, 17, 63, 404, 9858 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

REFERENCES

K. Betsumiya, On the classification of Type II codes over F_{2^r} with binary length 32, Preprint, 2002.

K. Betsumiya, P. Gaborit and M. Harada, Type II codes over F_{2^{r}, in Applied Algebra, Algebraic Algorithms and Error Correcting Codes, 2001, Lecture Notes in Comp. Sci. 2227, 102-111.

P. Gaborit, V. S. Pless, P. Sol\'e and A. O. L. Atkin, Type II codes over F_4, Finite Fields Applic. 8 (2002), 171-183.

D. K. Kim, H. K. Kim and J.-L. Kim, Type I codes over GF(4), Preprint, 2004.

LINKS

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. A106159.

Sequence in context: A204517 A143093 A117712 * A003323 A073591 A195995

Adjacent sequences:  A106155 A106156 A106157 * A106159 A106160 A106161

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 08 2005

EXTENSIONS

a(6)-a(8) from Koichi Betsumiya, Oct 15 2005

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.