Number of Carlitz compositions c of n such that the sequence of ascents and descents of c forms a Dyck path.
A304778
Number of Carlitz compositions c of n such that the sequence of ascents and descents of c forms a Dyck path.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =6a(8) =9a(9) =15a(10) =23a(11) =38a(12) =62a(13) =100a(14) =163a(15) =267a(16) =441a(17) =725a(18) =1198a(19) =1986a(20) =3291a(21) =5472a(22) =9116a(23) =15204a(24) =25399a(25) =42494a(26) =71183a(27) =119396a(28) =200507a(29) =337090
External references
- oeis: A304778