Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
A197641
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =2a(2) =82a(3) =2910a(4) =407810a(5) =243912221a(6) =520354155777
External references
- oeis: A197641