Nonprimes whose average of divisors is an integer.

Terms

a(0) =1a(1) =6a(2) =14a(3) =15a(4) =20a(5) =21a(6) =22a(7) =27a(8) =30a(9) =33a(10) =35a(11) =38a(12) =39a(13) =42a(14) =44a(15) =45a(16) =46a(17) =49a(18) =51a(19) =54a(20) =55a(21) =56a(22) =57a(23) =60a(24) =62a(25) =65a(26) =66a(27) =68a(28) =69a(29) =70