Difference between 2^(2*n-1) and the next larger square.

Terms

a(0) =2a(1) =1a(2) =4a(3) =16a(4) =17a(5) =68a(6) =89a(7) =356a(8) =697a(9) =1337a(10) =2449a(11) =4001a(12) =4417a(13) =17668a(14) =24329a(15) =4633a(16) =18532a(17) =74128a(18) =296512a(19) =1186048a(20) =1778369a(21) =1181833a(22) =4727332a(23) =18909328a(24) =28184177a(25) =17830441a(26) =71321764a(27) =285287056a(28) =381898097a(29) =9092137