A034202 Number of binary codes (not necessarily linear) of length n with 7 words.

0, 0, 1, 56, 1326, 19735, 221778, 2074059, 16957301, 124727148, 840130123, 5244256701, 30596969639, 167941891447, 871758267397, 4298158203818, 20204102328683, 90841311196884, 391801985882846, 1625205683251931, 6498532182528941

Offset

1,4

Links

Table of n, a(n) for n=1..21.

H. Fripertinger, Isometry Classes of Codes

H. Fripertinger, Enumeration, construction and random generation of block codes, Designs, Codes, Crypt., 14 (1998), 213-219.

Crossrefs

Cf. A034188-.

Sequence in context: A219469 A278079 A025597 * A160290 A030649 A319310

Adjacent sequences: A034199 A034200 A034201 * A034203 A034204 A034205

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

More terms from Sean A. Irvine, Aug 07 2020

Status

approved