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A034192 Number of binary codes of length 7 with n words. 9
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)
OFFSET

0,3

REFERENCES

H. Fripertinger, Enumeration, construction and random generation of block codes, Designs, Codes, Crypt., 14 (1998), 213-219.

LINKS

Table of n, a(n) for n=0..19.

H. Fripertinger, Isometry Classes of Codes

CROSSREFS

Cf. A034188, A034189, A034190, A034191, A034193, A034194, A034195, A034196, A034197.

Sequence in context: A099051 A187487 A299643 * A050918 A322557 A228699

Adjacent sequences:  A034189 A034190 A034191 * A034193 A034194 A034195

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 2 14:18 EDT 2020. Contains 334783 sequences. (Running on oeis4.)