login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110865 Number of Type I but not Type II additive Hermitian self-dual codes of length n over GF(4). 0
1, 1, 3, 4, 11, 20, 59, 161, 675, 3862, 45144, 1320284 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..12.

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

Sequence in context: A097072 A049977 A000677 * A152982 A001642 A001643

Adjacent sequences:  A110862 A110863 A110864 * A110866 A110867 A110868

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Sep 19 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 6 22:23 EDT 2020. Contains 333291 sequences. (Running on oeis4.)