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 A068292 #9 May 03 2012 16:59:30 %S A068292 1,4352,4294971392,961201829493850112,48781126844255370222607142912, %T A068292 561399464545957024370182236743498291167232, %U A068292 1465126373454769055363011684465705776628549543645731295232,867083863998912174882104147806181674429733314821142479758142332970286825472 %N A068292 1/18 times the number of colorings of an n X n staggered hexagonal array with 18 colors. %C A068292 Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4. %Y A068292 Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195. %K A068292 nonn %O A068292 1,2 %A A068292 _R. H. Hardin_, Feb 24 2002 %E A068292 a(5)-a(8) from _Alois P. Heinz_, May 03 2012