Bisection of A006950 (the odd part).

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =13a(5) =21a(6) =35a(7) =55a(8) =86a(9) =130a(10) =196a(11) =287a(12) =420a(13) =602a(14) =858a(15) =1206a(16) =1687a(17) =2331a(18) =3206a(19) =4368a(20) =5922a(21) =7967a(22) =10670a(23) =14193a(24) =18803a(25) =24766a(26) =32490a(27) =42411a(28) =55159a(29) =71416