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 A203360 #7 Jul 22 2025 17:10:50 %S A203360 13,547,16538,547897,17631496,572818585,18550312526,601393482628, %T A203360 19489674499639,631692508651393,20473304776032755,663554579452002670, %U A203360 21506172950462296264,697028243024982135832,22591098951348605776520 %N A203360 Number of nX6 binary arrays with every 1 immediately preceded by 0 to the left or above. %C A203360 Column 6 of A203362 %H A203360 R. H. Hardin, <a href="/A203360/b203360.txt">Table of n, a(n) for n = 1..210</a> %F A203360 Empirical: a(n) = 13*a(n-1) +510*a(n-2) +3549*a(n-3) +10014*a(n-4) +3375*a(n-5) -26874*a(n-6) -1779*a(n-7) +87219*a(n-8) -58872*a(n-9) -14769*a(n-10) +7653*a(n-11) +130*a(n-12) -433*a(n-13) +39*a(n-14) %e A203360 Some solutions for n=3 %e A203360 ..0..0..1..0..1..0....0..0..0..0..0..1....0..1..0..0..1..0....0..0..0..0..0..0 %e A203360 ..0..0..0..0..0..0....1..0..1..0..0..0....1..0..0..0..0..0....1..1..0..0..0..1 %e A203360 ..1..0..1..1..0..0....0..0..0..0..1..1....0..0..1..1..0..0....0..0..1..0..0..1 %K A203360 nonn %O A203360 1,1 %A A203360 _R. H. Hardin_ Dec 31 2011