Numbers n such that sum of divisors of these numbers gives a decimal repdigit.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =43a(7) =146a(8) =365a(9) =438a(10) =443a(11) =803a(12) =887a(13) =2221a(14) =4442a(15) =6663a(16) =8887a(17) =87876a(18) =88183a(19) =153837a(20) =250244a(21) =285597a(22) =292860a(23) =296294a(24) =302877a(25) =307674a(26) =344268a(27) =351612a(28) =380718a(29) =403398