Numbers n such that n!3 - 3^3 is prime, where n!3 = n!!! is a triple factorial number (A007661).

Terms

a(0) =8a(1) =11a(2) =13a(3) =22a(4) =29a(5) =49a(6) =56a(7) =61a(8) =103a(9) =142a(10) =149a(11) =257a(12) =319a(13) =365a(14) =680a(15) =736a(16) =737a(17) =749a(18) =947a(19) =974a(20) =1040a(21) =4277a(22) =4678a(23) =9961a(24) =10652a(25) =15545a(26) =18064a(27) =31325a(28) =34918a(29) =41032