Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,2,1,0,0 for x=0,1,2,3,4.
A197173
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,2,1,0,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =41a(3) =969a(4) =92206a(5) =22335117a(6) =16686610707
External references
- oeis: A197173