Numbers k such that k! - 1 is prime.

Terms

a(0) =3a(1) =4a(2) =6a(3) =7a(4) =12a(5) =14a(6) =30a(7) =32a(8) =33a(9) =38a(10) =94a(11) =166a(12) =324a(13) =379a(14) =469a(15) =546a(16) =974a(17) =1963a(18) =3507a(19) =3610a(20) =6917a(21) =21480a(22) =34790a(23) =94550a(24) =103040a(25) =147855a(26) =208003