A068299 1/10 the number of colorings of an n X n octagonal array with 10 colors.

1, 504, 9853704, 7488942792408, 221253369424029100872, 254101505958294674877998194968, 11344162587174574603922830864958174183688, 19687269229964173171963421211996119947570831281276072

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