Triangle read by rows: T(n,k) is number of noncrossing trees with n edges and having k nonroot nodes of degree 1.
A101449
Triangle read by rows: T(n,k) is number of noncrossing trees with n edges and having k nonroot nodes of degree 1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =4a(5) =4a(6) =11a(7) =24a(8) =12a(9) =8a(10) =41a(11) =88a(12) =96a(13) =32a(14) =16a(15) =146a(16) =410a(17) =440a(18) =320a(19) =80a(20) =32a(21) =564a(22) =1752a(23) =2460a(24) =1760a(25) =960a(26) =192a(27) =64a(28) =2199a(29) =7896
External references
- oeis: A101449