a(n) = smallest number k such that 2^n + k is a palindrome.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =6a(5) =1a(6) =2a(7) =3a(8) =6a(9) =3a(10) =87a(11) =64a(12) =18a(13) =36a(14) =77a(15) =55a(16) =20a(17) =59a(18) =118a(19) =137a(20) =825a(21) =750a(22) =610a(23) =230a(24) =545a(25) =1101a(26) =2312a(27) =4703a(28) =9406a(29) =7723