cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A207344 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.

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%I A207344 #7 Jul 22 2025 20:18:38
%S A207344 18,324,858,5290,27022,128292,684324,3524736,17492664,91157630,
%T A207344 466901309,2357231531,12176328967,62219037705,316361642076,
%U A207344 1627284771068,8309635888371,42388164632017,217515758892581,1110796489660535
%N A207344 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.
%C A207344 Column 6 of A207346
%H A207344 R. H. Hardin, <a href="/A207344/b207344.txt">Table of n, a(n) for n = 1..210</a>
%e A207344 Some solutions for n=4
%e A207344 ..1..0..1..0..1..0....0..1..0..0..1..0....1..1..0..1..0..1....0..1..0..1..0..1
%e A207344 ..0..0..1..0..1..0....1..1..1..1..1..1....1..0..1..0..1..0....1..0..1..0..1..0
%e A207344 ..0..1..0..1..0..1....1..0..0..1..0..0....0..1..0..0..1..0....1..1..0..0..1..0
%e A207344 ..1..1..1..0..1..0....0..0..1..0..0..1....1..1..1..1..0..1....0..1..0..1..0..1
%K A207344 nonn
%O A207344 1,1
%A A207344 _R. H. Hardin_ Feb 17 2012