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 A194192 #8 Dec 09 2017 03:57:21 %S A194192 0,0,0,204,26700,1073076,15657764,159413700,1108580092,6030207624, %T A194192 26852315940,104865006648,354993232192,1098793355508,3109294280324 %N A194192 Number of ways to arrange 7 indistinguishable points on an n X n square grid so that no three points are collinear at any angle. %C A194192 Column 7 of A194193. %e A194192 Some solutions for 4 X 4: %e A194192 ..0..0..1..1....1..0..1..0....0..0..1..0....0..0..0..1....1..0..1..0 %e A194192 ..0..0..0..1....0..0..0..1....0..0..1..1....1..0..1..0....0..1..0..0 %e A194192 ..1..1..0..0....0..1..0..1....1..1..0..0....1..0..1..0....0..1..0..1 %e A194192 ..0..1..1..0....0..1..1..0....0..1..0..1....0..1..0..1....1..0..1..0 %K A194192 nonn %O A194192 1,4 %A A194192 _R. H. Hardin_, Aug 18 2011