Numbers k such that k | (3^k + 3).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =12a(6) =15a(7) =28a(8) =366a(9) =435a(10) =532a(11) =804a(12) =1036a(13) =4636a(14) =6364a(15) =7932a(16) =11476a(17) =15051a(18) =19684a(19) =40132a(20) =75396a(21) =80956a(22) =247395a(23) =266476a(24) =280756a(25) =307396a(26) =356644a(27) =490372a(28) =531444a(29) =544348