A034238 - OEIS

%I #9 Aug 09 2020 01:08:19

%S 1,1,7,87,6429,2303283,2479201432,3874477609666,6599430028972418,

%T 11005421717482468773,17273734529317171068203,

%U 25181456057693008339763059,34003737003435994894150148682

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

%C a(4^7)=1 is the last term. - _Sean A. Irvine_, Aug 08 2020

%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,fini

%O 0,3

%A _N. J. A. Sloane_.