Harmonic numbers (A001599) which are not perfect (A000396).

Terms

a(0) =1a(1) =140a(2) =270a(3) =672a(4) =1638a(5) =2970a(6) =6200a(7) =8190a(8) =18600a(9) =18620a(10) =27846a(11) =30240a(12) =32760a(13) =55860a(14) =105664a(15) =117800a(16) =167400a(17) =173600a(18) =237510a(19) =242060a(20) =332640a(21) =360360a(22) =539400a(23) =695520a(24) =726180a(25) =753480a(26) =950976a(27) =1089270a(28) =1421280a(29) =1539720