Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
A243417
Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =13a(2) =109a(3) =748a(4) =4531a(5) =25228a(6) =132515a(7) =667747a(8) =3263146a(9) =15576803a(10) =72995158a(11) =336986263a(12) =1536565549a(13) =6933515253a(14) =31007787862a(15) =137599702886a(16) =606467289880
External references
- oeis: A243417