Number of nX7 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301840
Number of nX7 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =64a(1) =2778a(2) =72514a(3) =1986213a(4) =54948498a(5) =1518341751a(6) =41966406867
External references
- oeis: A301840