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 A068284 #9 May 03 2012 16:51:40 %S A068284 1,36,6588,6169500,29609340804,728465439240612,91873868538291559236, %T A068284 59398217444060775978706980,196856852524443536659406407297548 %N A068284 1/5 the number of colorings of an n X n staggered hexagonal array with 5 colors. %C A068284 Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4. %Y A068284 Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195. %K A068284 nonn %O A068284 1,2 %A A068284 _R. H. Hardin_, Feb 24 2002 %E A068284 a(8)-a(9) from _Alois P. Heinz_, May 03 2012