Numbers k such that 3*k! - 1 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =9a(7) =12a(8) =17a(9) =26a(10) =76a(11) =379a(12) =438a(13) =1695a(14) =6709a(15) =13313a(16) =18504a(17) =19021a(18) =24488a(19) =45552a(20) =49085a(21) =65451