Number of same-trees of weight n.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =2a(5) =14a(6) =2a(7) =54a(8) =10a(9) =38a(10) =2a(11) =494a(12) =2a(13) =134a(14) =42a(15) =4470a(16) =2a(17) =3422a(18) =2a(19) =10262a(20) =138a(21) =2054a(22) =2a(23) =490926a(24) =34a(25) =8198a(26) =1514a(27) =314294a(28) =2a(29) =628318