1/9 of the number of 9-colorings of an n X n array symmetric about both diagonal and antidiagonal.
A145259
1/9 of the number of 9-colorings of an n X n array symmetric about both diagonal and antidiagonal.
Terms
- a(0) =1a(1) =8a(2) =512a(3) =29184a(4) =13307904a(5) =5404672512
External references
- oeis: A145259