Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,0,1,1,1 for x=0,1,2,3,4.
A197273
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =9a(2) =34a(3) =627a(4) =16890a(5) =1276986a(6) =209785488a(7) =84453386767
External references
- oeis: A197273