Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,1 for x=0,1,2,3,4.
A197890
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =7a(2) =50a(3) =1141a(4) =82343a(5) =13332946a(6) =5912587870
External references
- oeis: A197890