Abundant numbers n such that sigma(sigma(n) - 2*n) = sigma(n).

Terms

a(0) =120a(1) =672a(2) =1740a(3) =7776a(4) =19260a(5) =20640a(6) =21384a(7) =21924a(8) =22428a(9) =25830a(10) =31440a(11) =55968a(12) =93024a(13) =101010a(14) =106140a(15) =143910a(16) =151164a(17) =198792a(18) =246510a(19) =309582a(20) =326196a(21) =411138a(22) =421596a(23) =428256a(24) =499464a(25) =523776a(26) =590112a(27) =639288a(28) =697158a(29) =870552