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 A068288 #9 May 03 2012 16:55:34 %S A068288 1,392,5765144,3181273031384,65865668592143803208, %T A068288 51166372312341376389944811656, %U A068288 1491342882335672198457853495232503998152,1630939089590623060636571472516037785233254346536136,66921448813902442793929754551432219305219935812987218443538247160 %N A068288 1/9 the number of colorings of an n X n staggered hexagonal array with 9 colors. %C A068288 Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4. %Y A068288 Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195. %K A068288 nonn %O A068288 1,2 %A A068288 _R. H. Hardin_, Feb 24 2002 %E A068288 a(6)-a(9) from _Alois P. Heinz_, May 03 2012