Total number of branches of length k (k>=1) in all ordered trees with n+k edges (it is independent of k).
A073663
Total number of branches of length k (k>=1) in all ordered trees with n+k edges (it is independent of k).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =113a(5) =428a(6) =1629a(7) =6226a(8) =23881a(9) =91884a(10) =354484a(11) =1370812a(12) =5312058a(13) =20622904a(14) =80196055a(15) =312319530a(16) =1217938665a(17) =4755296460a(18) =18586968840a(19) =72723903780a(20) =284804791230
External references
- oeis: A073663