A091328 -id:A091328 - cp's OEIS frontend

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A091327 Triangle T(n,k) read by rows giving number of inequivalent even binary linear [n,k] codes containing no zero columns (n >= 2, 1 <= k <= n-1).

Original entry on oeis.org

1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 2, 3, 2, 1, 0, 2, 4, 4, 2, 1, 1, 3, 8, 10, 7, 3, 1, 0, 3, 9, 18, 16, 9, 3, 1

Offset: 2

N. J. A. Sloane, Mar 01 2004

"Even" means that every word has even weight. Equivalently, the all-ones vector is in the dual code.

Difference between successive rows of A091325.

			Triangle begins
1
0 1
1 1 1
0 1 1 1
1 2 3 2 1
0 2 4 4 2 1

G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
Index entries for sequences related to binary linear codes

Cf. A091325. Row sums give A091328.

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