A068301 1/12 the number of colorings of an n X n octagonal array with 12 colors.

1, 990, 65675610, 292254818279490, 87238205544516133249890, 1746783780641161331912282302353810, 2346167125778415534349931707837063900925570370, 211381076411597878243848286563025939634200193105055412862370

Offset: 1

Author

R. H. Hardin, Feb 24 2002

Keywords

• nonn

Crossrefs

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

Extensions

a(5)-a(8) from Alois P. Heinz, May 04 2012