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 A194190 #9 Dec 09 2017 19:09:54 %S A194190 0,0,28,1668,25052,215448,1189868,5199888,18520572,56978440,155627304, %T A194190 388897892,894254904,1932504496,3945470564,7669533756,14291010972, %U A194190 25694009628,44662697948,75451394832,124066723008,199190308172 %N A194190 Number of ways to arrange 5 indistinguishable points on an n X n square grid so that no three points are collinear at any angle. %C A194190 Column 5 of A194193. %H A194190 R. H. Hardin, <a href="/A194190/b194190.txt">Table of n, a(n) for n = 1..24</a> %e A194190 Some solutions for 3 X 3: %e A194190 ..0..1..0....1..0..1....0..1..1....1..1..0....1..1..0....1..1..0....1..0..1 %e A194190 ..0..1..1....1..1..0....1..0..0....1..0..1....1..0..0....0..0..1....1..0..0 %e A194190 ..1..0..1....0..1..0....0..1..1....0..0..1....0..1..1....1..1..0....0..1..1 %K A194190 nonn %O A194190 1,3 %A A194190 _R. H. Hardin_, Aug 18 2011