Numbers k such that sigma(k) = 9*phi(k).

Terms

a(0) =30a(1) =264a(2) =714a(3) =3080a(4) =3828a(5) =6678a(6) =10098a(7) =12648a(8) =21318a(9) =22152a(10) =24882a(11) =44660a(12) =49938a(13) =61344a(14) =86304a(15) =94944a(16) =118296a(17) =129504a(18) =130356a(19) =147560a(20) =183396a(21) =199386a(22) =201756a(23) =207264a(24) =216936a(25) =248710a(26) =258440a(27) =265914a(28) =275196a(29) =290290