Number of partially labeled rooted trees with n nodes (3 of which are labeled).
A000444
Number of partially labeled rooted trees with n nodes (3 of which are labeled).
Terms
- a(0) =9a(1) =64a(2) =326a(3) =1433a(4) =5799a(5) =22224a(6) =81987a(7) =293987a(8) =1031298a(9) =3555085a(10) =12081775a(11) =40576240a(12) =134919788a(13) =444805274a(14) =1455645411a(15) =4733022100a(16) =15302145060a(17) =49223709597a(18) =157629612076a(19) =502736717207
External references
- oeis: A000444