Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops.
A221116
Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops.
Terms
- a(0) =0a(1) =0a(2) =51a(3) =3706a(4) =189762a(5) =9107191a(6) =423897591a(7) =19542896293a(8) =896843573267
External references
- oeis: A221116