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A034200
Number of binary codes (not necessarily linear) of length n with 5 words.
0
0, 0, 3, 27, 131, 497, 1606, 4647, 12320, 30493, 71218, 158374, 337375, 691981, 1371917, 2637956, 4932911, 8992413, 16013007, 27904818, 47663115, 79909497, 131666339
OFFSET
1,3
LINKS
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: A063263 A204809 A367967 * A306442 A080424 A285008
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(15)-a(23) from Sean A. Irvine, Aug 07 2020
STATUS
approved