Total number of palindromic primes in base 3 with n digits.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =3a(5) =0a(6) =12a(7) =0a(8) =8a(9) =0a(10) =47a(11) =0a(12) =106a(13) =0a(14) =280a(15) =0a(16) =720a(17) =0a(18) =1825a(19) =0a(20) =5107a(21) =0a(22) =14072a(23) =0a(24) =38606a(25) =0a(26) =107852a(27) =0a(28) =301048a(29) =0