Composite numbers such that every non-identity permutation gives a prime.

Terms

a(0) =14a(1) =16a(2) =20a(3) =30a(4) =32a(5) =34a(6) =35a(7) =38a(8) =50a(9) =70a(10) =74a(11) =76a(12) =91a(13) =92a(14) =95a(15) =98a(16) =110a(17) =118a(18) =119a(19) =133a(20) =772a(21) =775a(22) =778a(23) =779a(24) =1118a(25) =3337a(26) =7771a(27) =77779