Numbers equal to the sum of the aliquot parts of the following k numbers, for some k.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =15a(5) =31a(6) =33a(7) =56a(8) =63a(9) =127a(10) =135a(11) =168a(12) =255a(13) =511a(14) =1023a(15) =2047a(16) =2401a(17) =4095a(18) =5328a(19) =8191a(20) =16383a(21) =17360a(22) =21003a(23) =32767a(24) =41163a(25) =54721a(26) =65535a(27) =131071a(28) =262143a(29) =524287