Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318067
Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =3437a(2) =156846a(3) =8929364a(4) =479322719a(5) =26085599617
External references
- oeis: A318067