Total number of palindromic primes in base 3 below 3^n.

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =6a(5) =6a(6) =18a(7) =18a(8) =26a(9) =26a(10) =73a(11) =73a(12) =179a(13) =179a(14) =459a(15) =459a(16) =1179a(17) =1179a(18) =3004a(19) =3004a(20) =8111a(21) =8111a(22) =22183a(23) =22183a(24) =60789a(25) =60789a(26) =168641a(27) =168641a(28) =469689a(29) =469689