Least positive integer m such that sigma(m)/phi(m) = n + 1/2, where sigma(.) and phi(.) are given by A000203 and A000010, respectively.

A375262

Least positive integer m such that sigma(m)/phi(m) = n + 1/2, where sigma(.) and phi(.) are given by A000203 and A000010, respectively.

Terms

    a(0) =5a(1) =459a(2) =4a(3) =10a(4) =860a(5) =18a(6) =24a(7) =11904a(8) =588a(9) =60a(10) =1481172a(11) =1080a(12) =1320a(13) =6236370a(14) =1680a(15) =144480a(16) =10920a(17) =674520a(18) =27720a(19) =25604040a(20) =662535720a(21) =1413720a(22) =303783480a(23) =4324320a(24) =701205120

External references