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.

A188520 Number of nX6 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.

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%I A188520 #7 Jul 22 2025 11:15:15
%S A188520 33,1089,16438,231400,2800798,32470385,359696109,3903047802,
%T A188520 41642655120,440047202716,4617244898772,48229127405889,
%U A188520 502163657044635,5217313950984361,54124162283409093,560894846117339319
%N A188520 Number of nX6 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally.
%C A188520 Column 6 of A188523
%H A188520 R. H. Hardin, <a href="/A188520/b188520.txt">Table of n, a(n) for n = 1..200</a>
%e A188520 Some solutions for 3X6
%e A188520 ..0..0..0..1..0..0....0..0..1..0..0..1....1..0..0..1..0..1....0..0..0..0..0..0
%e A188520 ..1..0..1..0..0..1....0..0..1..1..1..1....1..0..0..0..0..1....0..1..0..0..1..1
%e A188520 ..1..0..1..0..1..0....0..0..1..1..1..1....1..1..1..1..1..1....0..1..0..1..0..0
%K A188520 nonn
%O A188520 1,1
%A A188520 _R. H. Hardin_ Apr 02 2011