Number of balanced numbers <= 2^n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =7a(5) =8a(6) =11a(7) =14a(8) =19a(9) =24a(10) =33a(11) =39a(12) =54a(13) =69a(14) =91a(15) =122a(16) =160a(17) =206a(18) =270a(19) =346a(20) =451a(21) =575a(22) =737a(23) =962a(24) =1260a(25) =1635a(26) =2110a(27) =2712a(28) =3491a(29) =4564