A034224 - OEIS

%I #10 Aug 09 2020 01:09:41

%S 0,5,34,144,490,1470,3990,10045,23750,53205,113694,233039,460096,

%T 878269,1626034

%N Number of ternary 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-.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_.

%E a(11)-a(15) from _Sean A. Irvine_, Aug 08 2020