Numbers k such that the average of greatest prime factors of all positive integers <= k is an integer.

A303659

Numbers k such that the average of greatest prime factors of all positive integers <= k is an integer.

Terms

    a(0) =2a(1) =5a(2) =6a(3) =24a(4) =27a(5) =28a(6) =79a(7) =1171a(8) =1901a(9) =1932a(10) =7845a(11) =19152a(12) =360698a(13) =649358a(14) =1731441a(15) =1979944a(16) =30658517a(17) =34337898a(18) =400114748a(19) =412626117a(20) =3738454462a(21) =7725156081a(22) =97366414806a(23) =129951504625a(24) =290788509485

External references