Numbers k such that k![4] - 512 is prime, where k![4] = A007662(k) = quadruple factorial.

Terms

a(0) =13a(1) =15a(2) =17a(3) =19a(4) =21a(5) =23a(6) =25a(7) =35a(8) =39a(9) =47a(10) =67a(11) =71a(12) =89a(13) =93a(14) =113a(15) =153a(16) =163a(17) =185a(18) =201a(19) =267a(20) =427a(21) =491a(22) =871a(23) =1645a(24) =3075a(25) =3351a(26) =3435a(27) =5385a(28) =7893a(29) =10649