Numbers k such that (k!-6)/6 is prime.

Terms

a(0) =4a(1) =5a(2) =7a(3) =8a(4) =11a(5) =14a(6) =16a(7) =17a(8) =18a(9) =20a(10) =43a(11) =50a(12) =55a(13) =59a(14) =171a(15) =461a(16) =859a(17) =2830a(18) =3818a(19) =5421a(20) =5593a(21) =10118a(22) =10880a(23) =24350