Numbers k such that phi(k) = rad(k) * sopfr(k), where phi(k) is the Euler totient function of k, rad(k) the squarefree kernel of k and sopfr(k) the integer log of k.

A280936

Numbers k such that phi(k) = rad(k) * sopfr(k), where phi(k) is the Euler totient function of k, rad(k) the squarefree kernel of k and sopfr(k) the integer log of k.

Terms

    a(0) =288a(1) =1225a(2) =4116a(3) =35378a(4) =54450a(5) =1693776a(6) =5969418a(7) =9396618a(8) =24509696310a(9) =246465324525

External references