Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,0 for x=0,1,2,3,4.
A197744
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =7a(2) =66a(3) =1317a(4) =115795a(5) =26488736a(6) =16946352492
External references
- oeis: A197744