Number of self-inverse permutations in S_n with longest increasing subsequence of length 5.
A217325
Number of self-inverse permutations in S_n with longest increasing subsequence of length 5.
Terms
- a(0) =1a(1) =5a(2) =29a(3) =127a(4) =583a(5) =2446a(6) =10484a(7) =43363a(8) =181546a(9) =748840a(10) =3114308a(11) =12878441a(12) =53594473a(13) =222761422a(14) =930856456a(15) =3893811380a(16) =16365678160a(17) =68937445765a(18) =291656714515
External references
- oeis: A217325