Number of Dyck paths of semilength n having exactly 8 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
A243878
Number of Dyck paths of semilength n having exactly 8 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =10a(2) =73a(3) =490a(4) =3127a(5) =19249a(6) =115021a(7) =669745a(8) =3812716a(9) =21277658a(10) =116666435a(11) =629665898a(12) =3350420024a(13) =17599292330a(14) =91368992279a(15) =469293511892
External references
- oeis: A243878