Number of dispersed Dyck paths of length n having no ascents of length 1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =7a(8) =12a(9) =18a(10) =31a(11) =47a(12) =81a(13) =125a(14) =216a(15) =337a(16) =583a(17) =918a(18) =1590a(19) =2522a(20) =4372a(21) =6977a(22) =12104a(23) =19415a(24) =33703a(25) =54297a(26) =94306a(27) =152507a(28) =265005a(29) =429974