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

A335069

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

Terms

    a(0) =1a(1) =2a(2) =6a(3) =30a(4) =210a(5) =2310a(6) =30030a(7) =120120a(8) =690690a(9) =1021020a(10) =2042040a(11) =4084080a(12) =9699690a(13) =58198140a(14) =96996900a(15) =106696590a(16) =223092870a(17) =892371480a(18) =6469693230a(19) =6915878970a(20) =19409079690a(21) =32348466150a(22) =71166625530a(23) =200560490130

External references