Divisor sum of the arithmetic function A085945(n).

Terms

a(0) =1a(1) =3a(2) =6a(3) =14a(4) =27a(5) =61a(6) =117a(7) =250a(8) =494a(9) =1012a(10) =2007a(11) =4088a(12) =8112a(13) =16357a(14) =32635a(15) =65493a(16) =130779a(17) =262115a(18) =523710a(19) =1048502a(20) =2096110a(21) =4194124a(22) =8386419a(23) =16777182a(24) =33550085a(25) =67108507a(26) =134209495a(27) =268434899a(28) =536853987a(29) =1073741664