Numbers n such that phi(n) = sigma(sum of distinct prime factors of n).

A075865

Numbers n such that phi(n) = sigma(sum of distinct prime factors of n).

Terms

    a(0) =18a(1) =20a(2) =52a(3) =57a(4) =70a(5) =381a(6) =426a(7) =543a(8) =1252a(9) =3027a(10) =4098a(11) =4612a(12) =6807a(13) =257799a(14) =302403a(15) =1583607a(16) =3272727a(17) =52859523a(18) =20402085927

External references