A145258 1/9 of the number of 9-colorings of an n X n array symmetric about main diagonal.

1, 64, 29184, 94818816, 2194974079488, 362034059960871936, 425455980192553057625088, 3562419025470409266468883742208, 212530144659518720790378044762226342912

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Crossrefs

Sequence in context: A052200 A146517 A009497 * A202911 A013743 A223353

Adjacent sequences: A145255 A145256 A145257 * A145259 A145260 A145261

Keyword

nonn

Author

R. H. Hardin, Oct 05 2008

Status

approved