a(n) = n - 2^(sum of digits of n).

Terms

a(0) =-1a(1) =-1a(2) =-2a(3) =-5a(4) =-12a(5) =-27a(6) =-58a(7) =-121a(8) =-248a(9) =-503a(10) =8a(11) =7a(12) =4a(13) =-3a(14) =-18a(15) =-49a(16) =-112a(17) =-239a(18) =-494a(19) =-1005a(20) =16a(21) =13a(22) =6a(23) =-9a(24) =-40a(25) =-103a(26) =-230a(27) =-485a(28) =-996a(29) =-2019