Triangle |S_{n,N}| read by rows, the number of permutations of [1..n] that are realized by a shift on N symbols.
A165325
Triangle |S_{n,N}| read by rows, the number of permutations of [1..n] that are realized by a shift on N symbols.
Terms
- a(0) =2a(1) =6a(2) =18a(3) =6a(4) =48a(5) =66a(6) =6a(7) =126a(8) =402a(9) =186a(10) =6a(11) =306a(12) =2028a(13) =2232a(14) =468a(15) =6a(16) =738a(17) =8790a(18) =19426a(19) =10212a(20) =1098a(21) =6
External references
- oeis: A165325