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 A194135 #7 Dec 09 2017 19:46:05 %S A194135 0,0,0,0,9,1875,52323,695616,5840088,35715529,172520643,708871152, %T A194135 2517687856,8023634766,23292994812,62357664744,155765126265, %U A194135 367482996726,822866800569,1762214894004,3621792301059 %N A194135 Number of ways to arrange 7 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle. %C A194135 Column 7 of A194136. %e A194135 Some solutions for 5 X 5 X 5: %e A194135 ......0..........0..........0..........0..........0..........0..........0 %e A194135 .....0.1........1.0........1.0........0.1........0.1........1.0........1.1 %e A194135 ....1.0.1......1.0.1......0.1.1......1.1.0......1.1.0......0.1.1......0.0.1 %e A194135 ...1.0.1.0....0.1.0.1....1.0.0.1....1.0.0.1....0.0.1.1....1.1.0.0....1.1.0.0 %e A194135 ..0.1.0.1.0..0.1.0.1.0..0.1.1.0.0..0.0.1.1.0..1.0.1.0.0..0.0.1.0.1..0.0.1.1.0 %K A194135 nonn %O A194135 1,5 %A A194135 _R. H. Hardin_, Aug 17 2011