Triangle read by rows: T(n,k) is the number of ordered trees with n edges having k even-length branches starting at the root (0<=k<=n).
A127541
Triangle read by rows: T(n,k) is the number of ordered trees with n edges having k even-length branches starting at the root (0<=k<=n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =2a(6) =8a(7) =5a(8) =1a(9) =24a(10) =15a(11) =3a(12) =75a(13) =46a(14) =10a(15) =1a(16) =243a(17) =148a(18) =34a(19) =4a(20) =808a(21) =489a(22) =116a(23) =16a(24) =1a(25) =2742a(26) =1652a(27) =402a(28) =61a(29) =5
External references
- oeis: A127541