Number of odd strict trees of weight n (all outdegrees are odd).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =2a(7) =3a(8) =5a(9) =7a(10) =11a(11) =18a(12) =27a(13) =45a(14) =75a(15) =125a(16) =207a(17) =353a(18) =591a(19) =1013a(20) =1731a(21) =2984a(22) =5122a(23) =8905a(24) =15369a(25) =26839a(26) =46732a(27) =81850a(28) =142932a(29) =251693