Numbers k such that (k - digitsum(k))(k + digitsum(k)) contains k as a substring.

Terms

a(0) =11a(1) =88a(2) =101a(3) =448a(4) =673a(5) =776a(6) =1001a(7) =2879a(8) =3553a(9) =9537a(10) =10001a(11) =14651a(12) =36559a(13) =49056a(14) =51073a(15) =54116a(16) =59600a(17) =100001a(18) =505025a(19) =998999a(20) =1000001a(21) =4115964a(22) =5050250a(23) =5133355a(24) =10000001a(25) =10050125a(26) =19349727a(27) =26550976a(28) =33726078a(29) =35792647