Number of length n left factors of Dyck paths having no triple-rises (triple-rise = three consecutive (1,1)-steps).

A191786

Number of length n left factors of Dyck paths having no triple-rises (triple-rise = three consecutive (1,1)-steps).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =5a(6) =9a(7) =12a(8) =22a(9) =30a(10) =55a(11) =77a(12) =141a(13) =201a(14) =368a(15) =532a(16) =974a(17) =1424a(18) =2607a(19) =3847a(20) =7043a(21) =10474a(22) =19176a(23) =28707a(24) =52559a(25) =79133a(26) =144888a(27) =219234a(28) =401420a(29) =610073

External references