%I #12 Jun 26 2017 01:24:26

%S 1,60,21060,44172540,553785175620,41503847098683420,

%T 18595665812583520041060,49808667823922052573513153300,

%U 797553247913411612275102392386088300,76343133584713932892876357250654965547341140,43684986787209742051887297631700585399912369700067860

%N 1/6 the number of colorings of an n X n octagonal array with 6 colors.

%Y Cf. A068239-A068305, A000332, A002417, A027441, A212208, A212209.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 24 2002

%E a(7)-a(8) from _Alois P. Heinz_, May 04 2012

%E a(9)-a(11) from _Andrew Howroyd_, Jun 25 2017