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A034204
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Number of binary codes (not necessarily linear) of length n with 9 words.
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0
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0, 0, 0, 56, 9013, 681474, 33297380, 1245930065, 38921113842, 1063289204514, 26089682147964, 584494025830394, 12087696271833266, 232582740271181155, 4188958906389785259, 70966356151034388909, 1135537418173238330558, 17222401475699072188275
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,4
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LINKS
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Table of n, a(n) for n=1..18.
H. Fripertinger, Isometry Classes of Codes
H. Fripertinger, Enumeration, construction and random generation of block codes, Designs, Codes, Crypt., 14 (1998), 213-219.
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CROSSREFS
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Cf. A034188-.
Sequence in context: A082167 A006690 A202922 * A275921 A091546 A059989
Adjacent sequences: A034201 A034202 A034203 * A034205 A034206 A034207
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane.
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EXTENSIONS
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More terms from Sean A. Irvine, Aug 07 2020
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STATUS
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approved
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