Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318017
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =6a(2) =45a(3) =569a(4) =12039a(5) =400016a(6) =20241433a(7) =1699138124a(8) =223853493247
External references
- oeis: A318017