Numbers k such that phi(phi(k))/k < phi(phi(m))/m for all m < k, where phi is Euler's totient function (A000010).

A293714

Numbers k such that phi(phi(k))/k < phi(phi(m))/m for all m < k, where phi is Euler's totient function (A000010).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =14a(6) =18a(7) =42a(8) =90a(9) =186a(10) =198a(11) =210a(12) =450a(13) =462a(14) =930a(15) =990a(16) =1050a(17) =2310a(18) =7350a(19) =14910a(20) =16170a(21) =66990a(22) =169050a(23) =177870a(24) =371910a(25) =1540770a(26) =2312310a(27) =4626930a(28) =4834830a(29) =19711230

External references