Number of nX4 array permutations with each element not moving, or moving one space E, S or NW.
A189605
Number of nX4 array permutations with each element not moving, or moving one space E, S or NW.
Terms
- a(0) =1a(1) =13a(2) =72a(3) =464a(4) =2853a(5) =17617a(6) =108785a(7) =671452a(8) =4144996a(9) =25586605a(10) =157944449a(11) =974979853a(12) =6018479996a(13) =37151644524a(14) =229334423389
External references
- oeis: A189605