A034199 Number of binary codes (not necessarily linear) of length n with 4 words.

0, 1, 6, 19, 47, 103, 203, 373, 649, 1079, 1727, 2681, 4048, 5969, 8620, 12218, 17028, 23378, 31654, 42324, 55941, 73155, 94725

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, A034189, A034190, A034191, A034192, A034193, A034194, A034195, A034196, A034197, A034198.

Sequence in context: A272047 A267829 A027963 * A272752 A272803 A273028

Adjacent sequences: A034196 A034197 A034198 * A034200 A034201 A034202

Keyword

nonn,more

Author

N. J. A. Sloane.

Extensions

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

Status

approved