The number of permutations of length n that can be sorted by 4 pop stacks in parallel.
A164872
The number of permutations of length n that can be sorted by 4 pop stacks in parallel.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =718a(6) =4884a(7) =35546a(8) =264590a(9) =1969912a(10) =14560996a(11) =106781758a(12) =778073440a(13) =5643649364a(14) =40811356112a(15) =294554236798
External references
- oeis: A164872