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 A068291 #8 May 03 2012 16:58:35 %S A068291 1,3600,2562894000,360815358806334000,10045362602062958738692122000, %T A068291 55306025603886596990726445398427484458000, %U A068291 60215114062840644498765447997163170597224027734057082000,12964769707834768710147648104687020983960635308403660120749080257740506000 %N A068291 1/17 the number of colorings of an n X n staggered hexagonal array with 17 colors. %C A068291 Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4. %Y A068291 Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195. %K A068291 nonn %O A068291 1,2 %A A068291 _R. H. Hardin_, Feb 24 2002 %E A068291 a(5)-a(8) from _Alois P. Heinz_, May 03 2012