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 A194479 #8 Dec 09 2017 03:57:35 %S A194479 0,0,0,0,15,3525,98473,1237434,9821400,57367112,268378248,1059987987, %T A194479 3661533037,11341971885,32090198922,84099053568,206386405560, %U A194479 478423135296,1054963957500,2225704950054,4514320792971,8838377453829 %N A194479 Number of ways to arrange 7 indistinguishable points on an n X n X n triangular grid so that no three points are in the same row or diagonal. %C A194479 Column 7 of A194480. %H A194479 R. H. Hardin, <a href="/A194479/b194479.txt">Table of n, a(n) for n = 1..24</a> %e A194479 Some solutions for 5 X 5 X 5: %e A194479 ......0..........0..........1..........0..........0..........1..........1 %e A194479 .....1.0........0.1........0.0........1.0........0.1........0.0........0.0 %e A194479 ....0.1.1......1.1.0......1.0.1......1.0.1......1.0.1......1.1.0......0.1.1 %e A194479 ...1.0.0.1....1.0.0.1....0.1.1.0....0.1.1.0....1.0.1.0....0.0.1.1....1.1.0.0 %e A194479 ..0.1.1.0.0..0.0.1.1.0..0.1.0.1.0..0.1.0.0.1..0.1.0.1.0..0.1.1.0.0..0.0.1.1.0 %K A194479 nonn %O A194479 1,5 %A A194479 _R. H. Hardin_, Aug 26 2011