Total number of palindromic primes in base 2 below 2^n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =3a(4) =5a(5) =5a(6) =8a(7) =8a(8) =11a(9) =11a(10) =18a(11) =18a(12) =30a(13) =30a(14) =53a(15) =53a(16) =93a(17) =93a(18) =187a(19) =187a(20) =329a(21) =329a(22) =600a(23) =600a(24) =1080a(25) =1080a(26) =1936a(27) =1936a(28) =3657a(29) =3657