Smallest palindromic number >= 2^n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =22a(5) =33a(6) =66a(7) =131a(8) =262a(9) =515a(10) =1111a(11) =2112a(12) =4114a(13) =8228a(14) =16461a(15) =32823a(16) =65556a(17) =131131a(18) =262262a(19) =524425a(20) =1049401a(21) =2097902a(22) =4194914a(23) =8388838a(24) =16777761a(25) =33555533a(26) =67111176a(27) =134222431a(28) =268444862a(29) =536878635