Numbers n such that phi(n) divides Sum_{k=1..n} phi(k).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =7a(6) =10a(7) =15a(8) =16a(9) =17a(10) =18a(11) =20a(12) =22a(13) =25a(14) =35a(15) =36a(16) =37a(17) =38a(18) =54a(19) =92a(20) =140a(21) =162a(22) =212a(23) =303a(24) =320a(25) =455a(26) =456a(27) =974a(28) =1028a(29) =1136