Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,2,1,3,4 for x=0,1,2,3,4.
A196131
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,2,1,3,4 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =4a(2) =4a(3) =31a(4) =326a(5) =3716a(6) =75720a(7) =2040678a(8) =86632050a(9) =5257705657
External references
- oeis: A196131