Numbers m such that every k <= m is a sum of proper divisors of m (for m>1).

Terms

a(0) =1a(1) =6a(2) =12a(3) =18a(4) =20a(5) =24a(6) =28a(7) =30a(8) =36a(9) =40a(10) =42a(11) =48a(12) =54a(13) =56a(14) =60a(15) =66a(16) =72a(17) =78a(18) =80a(19) =84a(20) =88a(21) =90a(22) =96a(23) =100a(24) =104a(25) =108a(26) =112a(27) =120a(28) =126a(29) =132