Number of n X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
A228749
Number of n X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
Terms
- a(0) =1a(1) =3a(2) =39a(3) =780a(4) =43862a(5) =4823826a(6) =1316714732a(7) =762713002760
External references
- oeis: A228749