Primes in which the frequency of every digit is also prime.

Terms

a(0) =11a(1) =11177a(2) =11551a(3) =11717a(4) =11777a(5) =12211a(6) =13313a(7) =13331a(8) =14411a(9) =15511a(10) =15551a(11) =16661a(12) =17117a(13) =18181a(14) =19919a(15) =19991a(16) =21121a(17) =21211a(18) =21221a(19) =22111a(20) =22277a(21) =22727a(22) =22777a(23) =27277a(24) =32233a(25) =32323a(26) =33113a(27) =33223a(28) =33311a(29) =33377