Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
A197402
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =9a(2) =60a(3) =3305a(4) =356211a(5) =93153650a(6) =77683473682
External references
- oeis: A197402