Numbers n such that phi(phi(n)) + sigma(sigma(n))=6*n.

A246630

Numbers n such that phi(phi(n)) + sigma(sigma(n))=6*n.

Terms

    a(0) =344a(1) =4016a(2) =16064a(3) =39208a(4) =69430a(5) =130250a(6) =1028096a(7) =1210928a(8) =4843712a(9) =16449536a(10) =65798144a(11) =309997568

External references