Number of n X 2 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208866
Number of n X 2 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =2a(1) =12a(2) =143a(3) =1979a(4) =28246a(5) =405481a(6) =5826959a(7) =83752328a(8) =1203835147a(9) =17303737555a(10) =248721498050
External references
- oeis: A208866