Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.
A197200
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =100a(3) =7073a(4) =1890344a(5) =1989885480
External references
- oeis: A197200