Numbers k that give record values for s(k)*phi(k)/k^2, where s(k) is the sum of squares of the differences between consecutive totatives of k (A322144).

A322165

Numbers k that give record values for s(k)*phi(k)/k^2, where s(k) is the sum of squares of the differences between consecutive totatives of k (A322144).

Terms

    a(0) =1a(1) =3a(2) =4a(3) =6a(4) =10a(5) =12a(6) =15a(7) =18a(8) =20a(9) =21a(10) =30a(11) =42a(12) =60a(13) =70a(14) =105a(15) =210a(16) =385a(17) =770a(18) =1155a(19) =2310a(20) =4620a(21) =5005a(22) =10010a(23) =15015a(24) =30030a(25) =60060a(26) =90090a(27) =120120a(28) =150150a(29) =180180

External references