Number of unlabeled rooted trees with n nodes in which all positive outdegrees are odd.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =11a(7) =21a(8) =40a(9) =80a(10) =159a(11) =322a(12) =657a(13) =1356a(14) =2816a(15) =5896a(16) =12407a(17) =26267a(18) =55861a(19) =119331a(20) =255878a(21) =550665a(22) =1188786a(23) =2574006a(24) =5588177a(25) =12162141a(26) =26529873a(27) =57993624a(28) =127020653a(29) =278716336