Number of Dyck paths of semilength n having exactly 8 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
A243420
Number of Dyck paths of semilength n having exactly 8 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =19a(2) =229a(3) =2184a(4) =17759a(5) =128509a(6) =851831a(7) =5278129a(8) =31020976a(9) =174803309a(10) =952033480a(11) =5042006351a(12) =26087126992a(13) =132340281386a(14) =660143136637
External references
- oeis: A243420