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 A203359 #7 Jul 22 2025 17:10:43 %S A203359 8,182,3042,55517,984703,17631496,314688054,5622720187,100426911671, %T A203359 1793946112019,32044214326230,572395728321380,10224472420371970, %U A203359 182635919619144937,3262355031315093696,58274202397081882837 %N A203359 Number of nX5 binary arrays with every 1 immediately preceded by 0 to the left or above. %C A203359 Column 5 of A203362 %H A203359 R. H. Hardin, <a href="/A203359/b203359.txt">Table of n, a(n) for n = 1..210</a> %F A203359 Empirical: a(n) = 8*a(n-1) +148*a(n-2) +471*a(n-3) +578*a(n-4) -25*a(n-5) -302*a(n-6) +171*a(n-7) +90*a(n-8) %e A203359 Some solutions for n=4 %e A203359 ..0..0..0..0..0....0..1..0..0..1....0..0..0..0..1....0..1..0..0..0 %e A203359 ..1..1..0..1..1....0..1..0..0..1....0..1..1..1..0....0..1..1..0..0 %e A203359 ..0..0..1..0..0....0..0..0..0..0....1..0..0..0..0....1..0..0..0..0 %e A203359 ..0..1..0..0..1....1..1..1..1..1....0..1..0..1..1....0..1..1..1..1 %K A203359 nonn %O A203359 1,1 %A A203359 _R. H. Hardin_ Dec 31 2011