Primes having only {0, 6, 7, 9} as digits.

Terms

a(0) =7a(1) =67a(2) =79a(3) =97a(4) =607a(5) =677a(6) =709a(7) =769a(8) =797a(9) =907a(10) =967a(11) =977a(12) =997a(13) =6007a(14) =6067a(15) =6079a(16) =6607a(17) =6679a(18) =6709a(19) =6779a(20) =6907a(21) =6967a(22) =6977a(23) =6997a(24) =7069a(25) =7079a(26) =7607a(27) =7669a(28) =7699a(29) =7907