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A034202
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Number of binary codes (not necessarily linear) of length n with 7 words.
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0
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0, 0, 1, 56, 1326, 19735, 221778, 2074059, 16957301, 124727148, 840130123, 5244256701, 30596969639, 167941891447, 871758267397, 4298158203818, 20204102328683, 90841311196884, 391801985882846, 1625205683251931, 6498532182528941
(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..21.
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: A219469 A278079 A025597 * A160290 A030649 A319310
Adjacent sequences: A034199 A034200 A034201 * A034203 A034204 A034205
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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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