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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.

A207745 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

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%I A207745 #7 Jul 22 2025 20:45:54
%S A207745 35,1225,20265,335241,6349893,120275089,2215586241,40813292529,
%T A207745 758253127923,14087268396601,260910039667519,4832310060602761,
%U A207745 89611728280729061,1661785304492145361,30800180353416930867
%N A207745 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.
%C A207745 Row 7 of A207741
%H A207745 R. H. Hardin, <a href="/A207745/b207745.txt">Table of n, a(n) for n = 1..210</a>
%e A207745 Some solutions for n=4
%e A207745 ..1..1..1..1....1..1..1..0....1..1..0..0....1..0..1..1....0..1..1..0
%e A207745 ..1..1..1..1....0..1..1..1....1..1..0..0....1..1..0..1....1..1..1..0
%e A207745 ..1..1..1..0....1..0..0..1....1..1..0..0....1..1..1..1....0..1..1..0
%e A207745 ..1..0..1..1....0..1..1..1....1..1..0..0....0..1..1..0....1..1..1..0
%e A207745 ..1..1..0..1....1..0..0..1....1..1..0..0....1..0..1..1....1..1..0..0
%e A207745 ..0..1..1..1....0..1..1..0....1..1..0..0....0..1..1..0....0..1..1..0
%e A207745 ..1..0..0..1....1..1..1..1....1..1..0..0....1..0..1..1....1..1..0..0
%K A207745 nonn
%O A207745 1,1
%A A207745 _R. H. Hardin_ Feb 19 2012