Number of distinct classes of permutations of length n under reversal and complement to n+1.
A275527
Number of distinct classes of permutations of length n under reversal and complement to n+1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =12a(5) =64a(6) =360a(7) =2544a(8) =20160a(9) =181632a(10) =1814400a(11) =19960320a(12) =239500800a(13) =3113533440a(14) =43589145600a(15) =653837506560
External references
- oeis: A275527