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A034199 Number of binary codes (not necessarily linear) of length n with 4 words. 0
0, 1, 6, 19, 47, 103, 203, 373, 649, 1079, 1727, 2681, 4048, 5969, 8620, 12218, 17028, 23378, 31654, 42324, 55941, 73155, 94725 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 17 22:19 EDT 2021. Contains 343071 sequences. (Running on oeis4.)