Number of permutations of length n sortable by a pop stack followed by a queue and then by a stack.

A214611

Number of permutations of length n sortable by a pop stack followed by a queue and then by a stack.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =685a(6) =4148a(7) =25661a(8) =159829a(9) =997870a(10) =6240672a(11) =39111747a(12) =245782289a(13) =1549368610

External references