
LINKS

Table of n, a(n) for n=0..5.
Koichi Betsumiya, Masaaki Harada and Akihiro Munemasa, A Complete Classification of Doubly Even SelfDual Codes of Length 40, arXiv:1104.3727v3 [math.CO], v3, Aug 02, 2012.  From Jonathan Vos Post, Aug 06 2012
J. H. Conway and V. S. Pless, On the enumeration of selfdual codes, J. Comb. Theory, A28 (1980), 2653. [DOI] MR0558873
J. H. Conway, V. Pless and N. J. A. Sloane, The Binary SelfDual Codes of Length Up to 32: A Revised Enumeration, J. Comb. Theory, A60 (1992), 183195 (Abstract, pdf, ps, Table A, Table D).
W. C. Huffman, On the classification and enumeration of selfdual codes, Finite Fields Applic. 11 (2005), 451490. [DOI]
G. Nebe, E. M. Rains and N. J. A. Sloane, SelfDual Codes and Invariant Theory, Springer, Berlin, 2006.
V. S. Pless, The children of the (32,16) doubly even codes, IEEE Trans. Inform. Theory, 24 (1978), 738746. [DOI] MR0514353
E. M. Rains and N. J. A. Sloane, Selfdual codes, pp. 177294 of Handbook of Coding Theory, Elsevier, 1998 (Abstract, pdf, ps).
