A034201 Number of binary codes (not necessarily linear) of length n with 6 words.

0, 0, 3, 50, 472, 3253, 18435, 91028, 404154, 1646000, 6232542, 22151853, 74433912, 237790084, 725557353, 2122652633, 5973816190, 16219720273, 42595011951, 108438121237, 268160583493, 645345542877, 1513887056435

Offset

1,3

Links

Table of n, a(n) for n=1..23.

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: A012857 A246221 A249249 * A099346 A075184 A337902

Adjacent sequences: A034198 A034199 A034200 * A034202 A034203 A034204

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

a(15)-a(23) from Sean A. Irvine, Aug 07 2020

Status

approved