Numbers k such that k![6]-2 is prime, where k![6] = A085158 (k) = sextuple factorial.

Terms

a(0) =4a(1) =5a(2) =7a(3) =11a(4) =13a(5) =23a(6) =25a(7) =31a(8) =33a(9) =37a(10) =59a(11) =63a(12) =91a(13) =157a(14) =265a(15) =267a(16) =327a(17) =539a(18) =555a(19) =621a(20) =715a(21) =921a(22) =979a(23) =1633a(24) =1821a(25) =2259a(26) =2697a(27) =2809a(28) =2863a(29) =2935