Squares which repeat with at least two full periods when written in base 2.

Terms

a(0) =36a(1) =1849a(2) =6241a(3) =29929a(4) =418609a(5) =672400a(6) =1320201a(7) =7458361a(8) =28121809a(9) =119355625a(10) =302794801a(11) =386554921a(12) =1211179204a(13) =1277991001a(14) =1967188609a(15) =5111964004a(16) =7681646025a(17) =30542106169a(18) =73073443041a(19) =79698371481a(20) =91424593225a(21) =120297291921a(22) =292293772164a(23) =318793485924