Integers k such that k divides 22^k - 1.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =21a(5) =27a(6) =39a(7) =49a(8) =63a(9) =81a(10) =117a(11) =147a(12) =189a(13) =243a(14) =273a(15) =343a(16) =351a(17) =441a(18) =507a(19) =567a(20) =729a(21) =819a(22) =1029a(23) =1053a(24) =1143a(25) =1323a(26) =1521a(27) =1701a(28) =1911a(29) =2187