Number of permutations of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 6.
A145846
Number of permutations of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 6.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =47a(4) =357a(5) =3270a(6) =34515a(7) =406460a(8) =5215829a(9) =71677058a(10) =1041363040a(11) =15841778155a(12) =250494079945
External references
- oeis: A145846