A145262 1/10 of the number of 10-colorings of an n X n array symmetric about both diagonal and antidiagonal.

1, 9, 729, 53217, 34963569, 20702317689, 110322682043409, 529844580885375513, 22902074117193334140729, 892152255428734239380169153, 312784895917026013539918026623401

Offset

1,2

Links

Table of n, a(n) for n=1..11.

Crossrefs

Sequence in context: A191367 A189821 A053933 * A154026 A013714 A069034

Adjacent sequences: A145259 A145260 A145261 * A145263 A145264 A145265

Keyword

nonn

Author

R. H. Hardin, Oct 05 2008

Status

approved