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Number of binary codes (not necessarily linear) of length n with 7 words.
0

%I #12 Jul 08 2025 20:07:48

%S 0,0,1,56,1326,19735,221778,2074059,16957301,124727148,840130123,

%T 5244256701,30596969639,167941891447,871758267397,4298158203818,

%U 20204102328683,90841311196884,391801985882846,1625205683251931,6498532182528941

%N Number of binary codes (not necessarily linear) of length n with 7 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

%O 1,4

%A _N. J. A. Sloane_

%E More terms from _Sean A. Irvine_, Aug 07 2020