Number of orderless same-trees of weight n.

Terms

a(0) =1a(1) =2a(2) =2a(3) =5a(4) =2a(5) =9a(6) =2a(7) =22a(8) =6a(9) =11a(10) =2a(11) =94a(12) =2a(13) =13a(14) =12a(15) =334a(16) =2a(17) =205a(18) =2a(19) =210a(20) =14a(21) =17a(22) =2a(23) =7218a(24) =8a(25) =19a(26) =68a(27) =443a(28) =2a(29) =1687