Number of Dyck paths of semilength n having exactly 9 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
A243879
Number of Dyck paths of semilength n having exactly 9 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =11a(2) =86a(3) =611a(4) =4106a(5) =26508a(6) =165608a(7) =1005693a(8) =5958138a(9) =34538560a(10) =196383607a(11) =1097479232a(12) =6038391492a(13) =32757730552a(14) =175436127352a(15) =928559489820
External references
- oeis: A243879