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%I #12 May 03 2012 16:47:57
%S 1,673072,24674450670,47695073906240,16222886703881375,
%T 1842996310592836896,98798502888215704812,3068393794369671728640,
%U 62960689505171989129005,933100312771109288146000,10639781342848431789710266,97779035987698387480546752,750090455960001686602653035
%N 1/6 the number of colorings of a 5 X 5 staggered hexagonal array with n colors.
%H Alois P. Heinz, <a href="/A068248/b068248.txt">Table of n, a(n) for n = 3..1000</a>
%H Alois P. Heinz, <a href="/A068248/a068248.txt">Formula for A068248</a>
%p a:= n-> (3006792824+ (-26845691044+ (115537440058+ (-319333174471+ (636781496832+ (-975359012827+ (1192518013138+ (-1193724499144+ (995462037353+ (-699932345254+ (418375639535+ (-213720396671+ (93568819963+ (-35133625647+ (11298632584+
%p (-3101089710+ (722137763+ (-141421592+ (23000726+ (-3051871+ (321994+ (-25992+ (1508+(-56+n)*n) *n)*n) *n)*n) *n)*n) *n)*n) *n)*n) *n)*n) *n) *n) *n) *n) *n) *n) *n) *n) *n) *n) *n/6:
%p seq (a(n), n=3..40); # _Alois P. Heinz_, May 03 2012
%Y Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195.
%K nonn
%O 3,2
%A _R. H. Hardin_, Feb 24 2002
%E Extended beyond a(10) by _Alois P. Heinz_, May 03 2012
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