Number of Dyck paths of semilength n having exactly 6 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
A243418
Number of Dyck paths of semilength n having exactly 6 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =15a(2) =144a(3) =1115a(4) =7509a(5) =45864a(6) =261185a(7) =1412742a(8) =7350116a(9) =37106514a(10) =182907585a(11) =884290974a(12) =4207172844a(13) =19747711113a(14) =91627676418a(15) =420914259695
External references
- oeis: A243418