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A034192
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Number of binary codes of length 7 with n words.
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9
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1, 1, 7, 23, 203, 1606, 18435, 221778, 2773763, 33297380, 375158732, 3907656327, 37504171766, 331785257145, 2712509085687, 20560611034067, 144992583036707, 954428916508309, 5882732966056385, 34048050206744705
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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REFERENCES
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H. Fripertinger, Enumeration, construction and random generation of block codes, Designs, Codes, Crypt., 14 (1998), 213-219.
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LINKS
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Table of n, a(n) for n=0..19.
H. Fripertinger, Isometry Classes of Codes
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CROSSREFS
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Cf. A034188, A034189, A034190, A034191, A034193, A034194, A034195, A034196, A034197.
Sequence in context: A099051 A187487 A299643 * A050918 A228699 A159485
Adjacent sequences: A034189 A034190 A034191 * A034193 A034194 A034195
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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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STATUS
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approved
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