Sum of all the digits of n in every prime-power base from 2 to n-1.

Terms

a(0) =2a(1) =3a(2) =7a(3) =9a(4) =13a(5) =13a(6) =16a(7) =19a(8) =26a(9) =28a(10) =36a(11) =39a(12) =42a(13) =34a(14) =45a(15) =44a(16) =55a(17) =59a(18) =63a(19) =64a(20) =76a(21) =75a(22) =80a(23) =82a(24) =82a(25) =87a(26) =102a(27) =112a(28) =128a(29) =113