Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 4.
A245144
Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 4.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =3a(10) =5a(11) =5a(12) =11a(13) =12a(14) =19a(15) =24a(16) =41a(17) =51a(18) =78a(19) =101a(20) =163a(21) =215a(22) =320a(23) =431a(24) =661a(25) =908a(26) =1333a(27) =1846a(28) =2745a(29) =3847
External references
- oeis: A245144