Number of nX2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than or equal to itself.
A196538
Number of nX2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than or equal to itself.
Terms
- a(0) =3a(1) =23a(2) =56a(3) =461a(4) =2897a(5) =17967a(6) =116911a(7) =757146a(8) =4893755a(9) =31718101a(10) =205477601a(11) =1331145835a(12) =8624488786a(13) =55876739813a(14) =362017883823
External references
- oeis: A196538