Composite numbers k for which k - phi(k) divides k-1.

Terms

a(0) =15a(1) =85a(2) =255a(3) =259a(4) =391a(5) =589a(6) =1111a(7) =3193a(8) =4171a(9) =4369a(10) =12361a(11) =17473a(12) =21845a(13) =25429a(14) =28243a(15) =47989a(16) =52537a(17) =65535a(18) =65641a(19) =68377a(20) =83767a(21) =91759a(22) =100777a(23) =120019a(24) =144097a(25) =167743a(26) =186367a(27) =268321a(28) =286357a(29) =291919