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

Terms

a(0) =16a(1) =17a(2) =34a(3) =38a(4) =49a(5) =62a(6) =74a(7) =97a(8) =125a(9) =137a(10) =146a(11) =178a(12) =188a(13) =235a(14) =664a(15) =863a(16) =916a(17) =1988a(18) =2059a(19) =2837a(20) =5353a(21) =5489a(22) =7483a(23) =9344a(24) =12631a(25) =13796a(26) =17122a(27) =23134a(28) =30409a(29) =33077