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

A145263

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

Terms

    a(0) =1a(1) =9a(2) =5337a(3) =3155553a(4) =123107175225

External references