Numbers n such that n!!! + 3^n is prime.

Terms

a(0) =0a(1) =2a(2) =16a(3) =17a(4) =20a(5) =22a(6) =28a(7) =31a(8) =37a(9) =40a(10) =53a(11) =65a(12) =71a(13) =73a(14) =82a(15) =124a(16) =130a(17) =187a(18) =203a(19) =266a(20) =308a(21) =326a(22) =386a(23) =502a(24) =662a(25) =1919a(26) =3136a(27) =3229a(28) =4640a(29) =8113