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 A220576 #6 Jul 23 2025 01:14:34 %S A220576 16,371,8334,165130,3162375,59690533,1120269376,20961430054, %T A220576 391477041024,7301113014734,136014086356403,2531419892514045, %U A220576 47074407789101798,874763025888567980,16244954731049984109,301509938118179385606 %N A220576 Equals one maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 nX5 array. %C A220576 Column 5 of A220579 %H A220576 R. H. Hardin, <a href="/A220576/b220576.txt">Table of n, a(n) for n = 1..33</a> %e A220576 Some solutions for n=3 %e A220576 ..0..0..1..0..0....0..0..0..1..0....0..1..1..1..0....0..0..0..1..1 %e A220576 ..1..0..0..0..0....0..1..0..1..0....1..0..1..0..1....0..0..0..0..0 %e A220576 ..1..1..1..0..0....0..1..0..1..1....1..0..1..0..1....1..0..1..1..0 %K A220576 nonn %O A220576 1,1 %A A220576 _R. H. Hardin_ Dec 16 2012