A145263 1/10 of the number of 10-colorings of an n X n array symmetric under 180 degree rotation.

1, 9, 5337, 3155553, 123107175225, 4788563588080785

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Crossrefs

Sequence in context: A167064 A125541 A151581 * A185821 A133248 A125542

Adjacent sequences: A145260 A145261 A145262 * A145264 A145265 A145266

Keyword

nonn

Author

R. H. Hardin, Oct 05 2008

Status

approved