A034199 - OEIS

%I #12 Aug 08 2020 14:04:48

%S 0,1,6,19,47,103,203,373,649,1079,1727,2681,4048,5969,8620,12218,

%T 17028,23378,31654,42324,55941,73155,94725

%N Number of binary codes (not necessarily linear) of length n with 4 words.

%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 Cf. A034188, A034189, A034190, A034191, A034192, A034193, A034194, A034195, A034196, A034197, A034198.

%K nonn,more

%O 1,3

%A _N. J. A. Sloane_.

%E a(15)-a(23) from _Sean A. Irvine_, Aug 07 2020