A034192 - OEIS

%I #20 Jan 15 2022 16:05:30

%S 1,1,7,23,203,1606,18435,221778,2773763,33297380,375158732,3907656327,

%T 37504171766,331785257145,2712509085687,20560611034067,

%U 144992583036707,954428916508309,5882732966056385,34048050206744705

%N Number of binary codes of length 7 with n words.

%H Sean A. Irvine, <a href="/A034192/b034192.txt">Table of n, a(n) for n = 0..128</a>

%H H. Fripertinger, <a href="http://www.mathe2.uni-bayreuth.de/frib/codes/tables.html">Isometry Classes of Codes</a>

%H H. Fripertinger, <a href="https://doi.org/10.1023/A:1008248618779">Enumeration, construction and random generation of block codes</a>, Designs, Codes, Crypt., 14 (1998), 213-219.

%Y Row n=7 of A039754.

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

%K nonn,fini,full

%O 0,3

%A _N. J. A. Sloane_