Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,3,0,1 for x=0,1,2,3,4.
A196780
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,3,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =1a(2) =17a(3) =145a(4) =6137a(5) =404589a(6) =65282256a(7) =22331701461
External references
- oeis: A196780