Primes whose sum of digits is 4.

Terms

a(0) =13a(1) =31a(2) =103a(3) =211a(4) =1021a(5) =1201a(6) =2011a(7) =3001a(8) =10111a(9) =20011a(10) =20101a(11) =21001a(12) =100003a(13) =102001a(14) =1000003a(15) =1011001a(16) =1020001a(17) =1100101a(18) =2100001a(19) =10010101a(20) =10100011a(21) =20001001a(22) =30000001a(23) =101001001a(24) =200001001a(25) =1000000021a(26) =1000001011a(27) =1000010101a(28) =1000020001a(29) =1000200001