Numbers n such that n!3 - 3^7 is prime, where n!3 = n!!! is a triple factorial number (A007661).

Terms

a(0) =13a(1) =14a(2) =16a(3) =19a(4) =22a(5) =23a(6) =26a(7) =38a(8) =64a(9) =104a(10) =137a(11) =203a(12) =296a(13) =346a(14) =347a(15) =379a(16) =481a(17) =568a(18) =899a(19) =1162a(20) =1603a(21) =2614a(22) =5698a(23) =5846a(24) =9253a(25) =9565a(26) =9848a(27) =10406a(28) =16051a(29) =18377