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

Terms

a(0) =8a(1) =10a(2) =11a(3) =13a(4) =16a(5) =19a(6) =20a(7) =22a(8) =37a(9) =38a(10) =47a(11) =73a(12) =92a(13) =94a(14) =100a(15) =218a(16) =241a(17) =284a(18) =482a(19) =541a(20) =736a(21) =787a(22) =829a(23) =916a(24) =1147a(25) =1312a(26) =1856a(27) =1928a(28) =2035a(29) =3134