Balanced numbers (A020492) k with a record value of sigma(k)/phi(k).

A335287

Balanced numbers (A020492) k with a record value of sigma(k)/phi(k).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =12a(4) =30a(5) =168a(6) =210a(7) =420a(8) =840a(9) =9240a(10) =83160a(11) =120120a(12) =5165160a(13) =26860680a(14) =277560360a(15) =569729160a(16) =16522145640a(17) =33044291280a(18) =563462139240

External references