Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 3.

A244704

Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 3.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =6a(4) =13a(5) =25a(6) =55a(7) =107a(8) =224a(9) =454a(10) =938a(11) =1916a(12) =3969a(13) =8163a(14) =16918a(15) =35010a(16) =72724a(17) =151093a(18) =314749a(19) =656115a(20) =1370348a(21) =2864948a(22) =5998547a(23) =12572884a(24) =26385837a(25) =55431031a(26) =116577538a(27) =245415158a(28) =517152607a(29) =1090771973

External references