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 A285747 #9 Aug 06 2025 16:30:28 %S A285747 6,150,4850,119506,3640966,101515318,3077883556,90409954434, %T A285747 2751592992660,82880894952670,2536733201153036,77454228451256600, %U A285747 2383647319436407454,73384273965571071952,2269082578454361003697,70246658028017329753966,2180567501204831340993622 %N A285747 Number of n X 5 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. %H A285747 R. H. Hardin, <a href="/A285747/b285747.txt">Table of n, a(n) for n = 1..87</a> %e A285747 Some solutions for n=4 %e A285747 ..0..1..0..0..0. .1..0..0..1..1. .1..1..0..1..0. .0..0..0..1..0 %e A285747 ..1..1..1..1..0. .1..0..1..1..0. .1..0..0..0..0. .0..0..0..1..1 %e A285747 ..1..1..1..0..0. .0..0..0..1..1. .1..0..1..0..0. .0..0..0..1..1 %e A285747 ..1..1..0..0..1. .0..1..0..0..1. .0..1..1..0..1. .0..1..1..0..1 %Y A285747 Column 5 of A285750. %K A285747 nonn %O A285747 1,1 %A A285747 _R. H. Hardin_, Apr 25 2017