a(n) = A001045(n) + A052928(n).

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =9a(5) =15a(6) =27a(7) =49a(8) =93a(9) =179a(10) =351a(11) =693a(12) =1377a(13) =2743a(14) =5475a(15) =10937a(16) =21861a(17) =43707a(18) =87399a(19) =174781a(20) =349545a(21) =699071a(22) =1398123a(23) =2796225a(24) =5592429a(25) =11184835a(26) =22369647a(27) =44739269a(28) =89478513a(29) =178956999