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.
%I A207465 #7 Jul 22 2025 20:27:36 %S A207465 18,324,1504,11760,71928,491948,3205650,21396734,141284580,937096086, %T A207465 6200491878,41068721206,271907375738,1800712574474,11924220367590, %U A207465 78964416331158,522900715972816,3462653747527630,22929637855256258 %N A207465 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically. %C A207465 Column 6 of A207467 %H A207465 R. H. Hardin, <a href="/A207465/b207465.txt">Table of n, a(n) for n = 1..210</a> %e A207465 Some solutions for n=4 %e A207465 ..1..1..1..1..1..1....1..0..1..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1 %e A207465 ..1..1..1..1..0..1....0..0..1..0..0..1....1..0..0..1..0..0....1..0..1..0..1..0 %e A207465 ..1..1..1..1..0..0....0..0..1..0..0..1....1..0..0..1..0..0....1..0..1..0..1..0 %e A207465 ..1..1..1..0..1..0....1..0..0..1..0..1....0..1..0..0..1..0....0..1..0..0..1..0 %K A207465 nonn %O A207465 1,1 %A A207465 _R. H. Hardin_ Feb 18 2012