Number of nXn 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318208
Number of nXn 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =3a(2) =4a(3) =69a(4) =1042a(5) =28010a(6) =1122773a(7) =93034400a(8) =12949799902
External references
- oeis: A318208