Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,2,1,1,1 for x=0,1,2,3,4.
A197776
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,2,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =5a(2) =67a(3) =3021a(4) =384758a(5) =153517349a(6) =186804530634
External references
- oeis: A197776