Sum of binary palindromes p < 2^n.

Terms

a(0) =0a(1) =1a(2) =4a(3) =16a(4) =40a(5) =136a(6) =328a(7) =1096a(8) =2632a(9) =8776a(10) =21064a(11) =70216a(12) =168520a(13) =561736a(14) =1348168a(15) =4493896a(16) =10785352a(17) =35951176a(18) =86282824a(19) =287609416a(20) =690262600a(21) =2300875336a(22) =5522100808a(23) =18407002696a(24) =44176806472a(25) =147256021576a(26) =353414451784