Squares whose digits are powers of 2.

Terms

a(0) =1a(1) =4a(2) =81a(3) =121a(4) =144a(5) =441a(6) =484a(7) =841a(8) =1444a(9) =8281a(10) =11881a(11) =14884a(12) =28224a(13) =48841a(14) =114244a(15) =128881a(16) =142884a(17) =221841a(18) =228484a(19) =848241a(20) =1121481a(21) =1281424a(22) =1418481a(23) =2184484a(24) =2214144a(25) =8282884a(26) =11142244a(27) =11282881a(28) =18241441a(29) =18818244