Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,1 for x=0,1,2,3,4.
A197799
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =102a(3) =7185a(4) =1944779a(5) =2076384112
External references
- oeis: A197799