Number of rooted unlabeled trees on n nodes where each node has at most 11 children.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =9a(6) =20a(7) =48a(8) =115a(9) =286a(10) =719a(11) =1842a(12) =4766a(13) =12485a(14) =32970a(15) =87802a(16) =235355a(17) =634771a(18) =1720940a(19) =4688041a(20) =12824394a(21) =35216524a(22) =97039824a(23) =268238379a(24) =743596131a(25) =2066801045a(26) =5758552717a(27) =16080588286a(28) =44997928902a(29) =126160000878