Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4.
A197084
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =2a(2) =25a(3) =631a(4) =71867a(5) =21996614a(6) =21989908007
External references
- oeis: A197084