A068297 1/8 the number of colorings of an n X n octagonal array with 8 colors.

1, 210, 813750, 58494843750, 77998664766618750, 1929292299321647690193750, 885215793907124317300191394818750, 7534251364260636630211044759506294857668750

Offset: 1

Author

R. H. Hardin, Feb 24 2002

Keywords

• nonn

Crossrefs

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

Extensions

a(6)-a(8) from Alois P. Heinz, May 04 2012