Numbers n such that n!3 + 3^9 is prime, where n!3 = n!!! is a triple factorial number (A007661).

Terms

a(0) =4a(1) =8a(2) =10a(3) =11a(4) =14a(5) =17a(6) =20a(7) =22a(8) =29a(9) =32a(10) =44a(11) =56a(12) =61a(13) =173a(14) =202a(15) =211a(16) =215a(17) =241a(18) =388a(19) =410a(20) =416a(21) =569a(22) =583a(23) =680a(24) =823a(25) =964a(26) =1271a(27) =1732a(28) =2309a(29) =2335