Numerator of Sum_{k<=n} P(k)/p(k), where p(k) (resp. P(k)) is smallest (resp. largest) prime divisor of k.

A057158

Numerator of Sum_{k<=n} P(k)/p(k), where p(k) (resp. P(k)) is smallest (resp. largest) prime divisor of k.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =13a(6) =15a(7) =17a(8) =19a(9) =12a(10) =13a(11) =29a(12) =31a(13) =19a(14) =62a(15) =65a(16) =68a(17) =145a(18) =151a(19) =83a(20) =30a(21) =71a(22) =73a(23) =38a(24) =39a(25) =91a(26) =93a(27) =50a(28) =51a(29) =107

External references