Number of Dyck paths of semilength n having exactly 7 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
A243877
Number of Dyck paths of semilength n having exactly 7 (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =9a(2) =61a(3) =385a(4) =2323a(5) =13583a(6) =77363a(7) =430573a(8) =2348528a(9) =12584052a(10) =66372328a(11) =345160962a(12) =1772302098a(13) =8996192858a(14) =45189272314a(15) =224832198163
External references
- oeis: A243877