Number of permutations of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 5.
A145844
Number of permutations of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 5.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =46a(4) =332a(5) =2784a(6) =25888a(7) =259382a(8) =2749244a(9) =30449416a(10) =349379648a(11) =4127103776a(12) =49954287424a(13) =617299996928
External references
- oeis: A145844