Number of permutations p of [2n+1] such that the sequence of ascents and descents of 0p0 forms a Dyck path.
A303286
Number of permutations p of [2n+1] such that the sequence of ascents and descents of 0p0 forms a Dyck path.
Terms
- a(0) =1a(1) =4a(2) =60a(3) =1974a(4) =114972a(5) =10490392a(6) =1384890104a(7) =250150900354
External references
- oeis: A303286