Number of prime palindromes with n digits.

Terms

a(0) =4a(1) =1a(2) =15a(3) =0a(4) =93a(5) =0a(6) =668a(7) =0a(8) =5172a(9) =0a(10) =42042a(11) =0a(12) =353701a(13) =0a(14) =3036643a(15) =0a(16) =27045226a(17) =0a(18) =239093865a(19) =0a(20) =2158090933a(21) =0a(22) =19742800564a(23) =0a(24) =180815391365a(25) =0