Numbers k where records occur for phi(k)/phi(k+1), where phi is the Euler totient function (A000010).

A335070

Numbers k where records occur for phi(k)/phi(k+1), where phi is the Euler totient function (A000010).

Terms

    a(0) =1a(1) =5a(2) =11a(3) =17a(4) =23a(5) =29a(6) =59a(7) =89a(8) =149a(9) =179a(10) =209a(11) =389a(12) =419a(13) =839a(14) =1049a(15) =1259a(16) =1889a(17) =2099a(18) =2309a(19) =9239a(20) =11549a(21) =13859a(22) =20789a(23) =23099a(24) =25409a(25) =30029a(26) =90089a(27) =180179a(28) =210209a(29) =270269

External references