Number of sequences in {1,...,2n}^(2n) with longest increasing subsequence of length n.
A268949
Number of sequences in {1,...,2n}^(2n) with longest increasing subsequence of length n.
Terms
- a(0) =1a(1) =3a(2) =175a(3) =23611a(4) =5179791a(5) =1583828620a(6) =621893381187
External references
- oeis: A268949