Total number of palindromic primes in base 5 with n digits.

Terms

a(0) =2a(1) =0a(2) =5a(3) =0a(4) =18a(5) =0a(6) =58a(7) =0a(8) =160a(9) =0a(10) =795a(11) =0a(12) =3167a(13) =0a(14) =13519a(15) =0a(16) =60829a(17) =0a(18) =270693a(19) =0a(20) =1177412a(21) =0a(22) =5502114a(23) =0a(24) =25026242a(25) =0a(26) =114884910a(27) =0