Total number of palindromic primes in base 8 with n digits.

Terms

a(0) =4a(1) =0a(2) =13a(3) =0a(4) =47a(5) =0a(6) =311a(7) =0a(8) =1944a(9) =0a(10) =12811a(11) =0a(12) =84424a(13) =0a(14) =575612a(15) =0a(16) =4078451a(17) =0a(18) =28998777a(19) =0a(20) =205852759a(21) =0