%I #9 May 03 2012 16:53:26

%S 1,150,390750,17684490750,13905331460469750,189961376944305892137750,

%T 45086270412704540409445089549750,

%U 185916670055945278226619825124072763091750,13319483009963134380534870853035913218901916338644750

%N 1/7 the number of colorings of an n X n staggered hexagonal array with 7 colors.

%C Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.

%Y Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 24 2002

%E a(7)-a(9) from _Alois P. Heinz_, May 03 2012