Number of 2-colored Dyck n-paths with up steps (U, u), down steps (D, d), and avoiding UU and DD.
A212694
Number of 2-colored Dyck n-paths with up steps (U, u), down steps (D, d), and avoiding UU and DD.
Terms
- a(0) =1a(1) =4a(2) =25a(3) =197a(4) =1745a(5) =16580a(6) =165115a(7) =1700809a(8) =17971466a(9) =193710087a(10) =2121585340a(11) =23543198588a(12) =264138223362
External references
- oeis: A212694