Numbers k such that 5*k! - 1 is prime.

Terms

a(0) =3a(1) =5a(2) =8a(3) =13a(4) =20a(5) =25a(6) =51a(7) =97a(8) =101a(9) =241a(10) =266a(11) =521a(12) =1279a(13) =1750a(14) =2204a(15) =2473a(16) =4193a(17) =5181a(18) =10080