Triangle read by rows: T(n,k) is the number of partially labeled trees with n nodes, k of which are labeled, 0 <= k <= n.
A034799
Triangle read by rows: T(n,k) is the number of partially labeled trees with n nodes, k of which are labeled, 0 <= k <= n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =3a(9) =3a(10) =2a(11) =4a(12) =9a(13) =16a(14) =16a(15) =3a(16) =9a(17) =26a(18) =67a(19) =125a(20) =125a(21) =6a(22) =20a(23) =75a(24) =251a(25) =680a(26) =1296a(27) =1296a(28) =11a(29) =48
External references
- oeis: A034799