Number of n X n 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.
A301656
Number of n X n 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =13a(4) =46a(5) =254a(6) =2335a(7) =37679a(8) =1036686a(9) =47847128a(10) =3666918138a(11) =462476814296
External references
- oeis: A301656