Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
A243875
Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =7a(2) =40a(3) =219a(4) =1161a(5) =6035a(6) =30816a(7) =154815a(8) =766711a(9) =3749225a(10) =18128129a(11) =86772929a(12) =411599785a(13) =1936434085a(14) =9042584447a(15) =41939926492a(16) =193310490160a(17) =885917766448
External references
- oeis: A243875