Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A301602
Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =25a(4) =330a(5) =8888a(6) =591585a(7) =83224304a(8) =23865691820
External references
- oeis: A301602