Smallest solution to gcd(x, Rev(x)) = 2^n.

Terms

a(0) =2a(1) =4a(2) =8a(3) =2192a(4) =21920a(5) =291008a(6) =610688a(7) =2112256a(8) =2131456a(9) =2937856a(10) =25329664a(11) =230465536a(12) =694018048a(13) =2344321024a(14) =4688642048a(15) =2112421888a(16) =65012891648a(17) =650128916480a(18) =4494196736a(19) =63769149440a(20) =637691494400