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 A303245 #4 Apr 20 2018 10:57:57 %S A303245 16,6,181,61,1106,1373,11111,38480,221943,1162591,6612354,37797923, %T A303245 222063807,1285446882,7608314073,44383042633,261786226112, %U A303245 1535739151907,9031702593457,53103496045060,312053768598165,1835371700840177 %N A303245 Number of 5Xn 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303245 Row 5 of A303242. %H A303245 R. H. Hardin, <a href="/A303245/b303245.txt">Table of n, a(n) for n = 1..210</a> %e A303245 Some solutions for n=5 %e A303245 ..0..0..0..1..0. .0..1..1..0..0. .0..1..1..0..0. .0..0..1..1..0 %e A303245 ..0..0..1..1..1. .1..1..0..0..1. .1..1..0..0..1. .1..0..0..1..1 %e A303245 ..0..0..0..0..0. .0..1..1..0..1. .0..1..1..0..1. .1..0..0..1..0 %e A303245 ..1..0..1..0..1. .0..1..1..0..0. .1..1..0..0..0. .1..0..0..1..1 %e A303245 ..1..0..1..0..1. .1..1..0..0..1. .0..1..1..0..1. .1..0..0..1..1 %Y A303245 Cf. A303242. %K A303245 nonn %O A303245 1,1 %A A303245 _R. H. Hardin_, Apr 20 2018