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 A194191 #8 Dec 09 2017 19:46:16 %S A194191 0,0,2,998,36698,620210,5367308,34678364,169259212,682686652, %T A194191 2356999994,7294368210,20227526910,52008171998,124422857864, %U A194191 279767468172,596674510744,1218556387684,2385034544810,4509309201242 %N A194191 Number of ways to arrange 6 indistinguishable points on an n X n square grid so that no three points are collinear at any angle. %C A194191 Column 6 of A194193. %e A194191 Some solutions for 4 X 4: %e A194191 ..1..0..1..0....0..1..1..0....1..0..0..1....0..1..0..0....0..1..0..1 %e A194191 ..0..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..0..1 %e A194191 ..0..1..0..0....0..1..1..0....0..0..0..0....0..0..1..0....0..0..1..0 %e A194191 ..0..0..1..1....1..0..0..0....0..1..1..0....1..0..0..1....1..0..1..0 %K A194191 nonn %O A194191 1,3 %A A194191 _R. H. Hardin_, Aug 18 2011