Numbers n such that n!3 + 3^8 is prime, where n!3 = n!!! is a triple factorial number (A007661).

Terms

a(0) =2a(1) =5a(2) =10a(3) =26a(4) =34a(5) =35a(6) =37a(7) =59a(8) =68a(9) =76a(10) =104a(11) =106a(12) =188a(13) =193a(14) =242a(15) =278a(16) =287a(17) =290a(18) =572a(19) =772a(20) =773a(21) =1304a(22) =2384a(23) =2716a(24) =3715a(25) =4562a(26) =6706a(27) =11489a(28) =11711a(29) =21602