Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 4.

A244705

Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 4.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =6a(4) =15a(5) =29a(6) =68a(7) =140a(8) =312a(9) =660a(10) =1443a(11) =3084a(12) =6710a(13) =14425a(14) =31278a(15) =67508a(16) =146300a(17) =316424a(18) =685955a(19) =1486008a(20) =3223480a(21) =6992012a(22) =15179437a(23) =32960891a(24) =71617874a(25) =155661971a(26) =338508703a(27) =736401503a(28) =1602712182a(29) =3489454243

External references