Number of Dyck paths of semilength n having exactly 9 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
A243421
Number of Dyck paths of semilength n having exactly 9 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =21a(2) =279a(3) =2914a(4) =25771a(5) =201454a(6) =1433041a(7) =9469739a(8) =59016909a(9) =350829247a(10) =2006522229a(11) =11114963598a(12) =59942608977a(13) =316006164419
External references
- oeis: A243421