Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals one.
A288540
Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals one.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =5a(4) =13a(5) =35a(6) =112a(7) =368a(8) =1208a(9) =3992a(10) =13449a(11) =46187a(12) =160804a(13) =565535a(14) =2005796a(15) =7168058a(16) =25793100a(17) =93388250a(18) =340005973a(19) =1244062960a(20) =4572478054a(21) =16874672868a(22) =62508259095a(23) =232338076267a(24) =866289458048
External references
- oeis: A288540