Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,1,2 for x=0,1,2,3,4.
A197231
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,1,2 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =31a(2) =242a(3) =2117a(4) =17759a(5) =141210a(6) =1207249a(7) =10193669a(8) =85161702a(9) =716691651a(10) =6018972449a(11) =50526364522a(12) =424443693477
External references
- oeis: A197231