Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,4,0,2,1 for x=0,1,2,3,4.
A196647
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,4,0,2,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =7a(2) =27a(3) =391a(4) =15289a(5) =965315a(6) =163282859a(7) =65251102177
External references
- oeis: A196647