Number of 7Xn array permutations with each element not moving, or moving one space N, SW or SE.

A189439

Number of 7Xn array permutations with each element not moving, or moving one space N, SW or SE.

Terms

    a(0) =1a(1) =85a(2) =1245a(3) =26589a(4) =493941a(5) =9557077a(6) =181540773a(7) =3467525301a(8) =66045131269

External references