A018237 Weight distribution of hypothetical [ 68,34,12 ] code derived from hypothetical [ 72,36,16 ] doubly-even self-dual code.

1, 0, 0, 0, 0, 0, 442, 14960, 174471, 1478048, 9546537, 46699952, 175078410, 509477760, 1160564636, 2081169376, 2949602799, 3312254400, 2949602799, 2081169376, 1160564636, 509477760, 175078410, 46699952, 9546537, 1478048, 174471, 14960, 442, 0, 0, 0, 0, 0, 1

Offset

0,7

References

S. T. Dougherty and M Harada, Extremal and shadow extremal binary self-dual codes, preprint (Masaaki HARADA, harada(AT)math.okayama-u.ac.jp).

Links

Table of n, a(n) for n=0..34.

S. T. Dougherty, Publications

S. T. Dougherty, A related length 68 code.

S. T. Dougherty and M. Harada, New extremal self-dual codes of length 68, IEEE Transactions on Information Theory, 45 (1999), 2133-2136.

Crossrefs

Cf. A018236.

Sequence in context: A236706 A105922 A250086 * A264270 A098256 A225350

Adjacent sequences: A018234 A018235 A018236 * A018238 A018239 A018240

Keyword

nonn,fini,full

Author

N. J. A. Sloane

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Jun 15 2001

a(27)-a(28) corrected by Andrey Zabolotskiy, Nov 22 2021

Status

approved