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.

A207743 Number of 5Xn 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 A207743 #7 Jul 22 2025 20:45:39
%S A207743 14,196,1414,10201,86355,731025,5959350,48580900,400851670,3307515121,
%T A207743 27172739769,223236405441,1837212857466,15120074510116,
%U A207743 124343788256622,1022572849602249,8412135030604107,69201930992634801,569203250129458902
%N A207743 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.
%C A207743 Row 5 of A207741
%H A207743 R. H. Hardin, <a href="/A207743/b207743.txt">Table of n, a(n) for n = 1..210</a>
%e A207743 Some solutions for n=4
%e A207743 ..0..1..1..0....0..0..1..1....0..1..1..0....1..1..0..0....0..1..1..1
%e A207743 ..1..1..0..1....1..0..1..1....0..1..1..1....0..0..1..1....1..0..1..1
%e A207743 ..0..0..1..1....1..0..0..1....0..0..1..1....1..1..1..1....1..1..1..1
%e A207743 ..1..1..1..0....1..0..1..1....0..1..1..0....0..0..1..1....0..1..1..0
%e A207743 ..0..1..1..1....1..0..1..1....0..0..1..1....1..1..0..0....1..1..0..1
%K A207743 nonn
%O A207743 1,1
%A A207743 _R. H. Hardin_ Feb 19 2012