Numbers n such that sigma(phi(n))/sigma(n) = 5.

Terms

a(0) =1033474069a(1) =1604277377a(2) =2741806637a(3) =9941342981a(4) =14754456491a(5) =14859359791a(6) =15887724883a(7) =16990353761a(8) =17266051069a(9) =20892536447a(10) =21776951239a(11) =24435763193a(12) =25165559143a(13) =32325726313a(14) =38313868379a(15) =38580669727a(16) =38856433193a(17) =47906215417a(18) =49094416289a(19) =56237053007