Squares whose digits occur with an equal minimal frequency of 2.

Terms

a(0) =7744a(1) =228484a(2) =332929a(3) =339889a(4) =511225a(5) =698896a(6) =774400a(7) =776161a(8) =797449a(9) =11303044a(10) =11464996a(11) =15295921a(12) =16621929a(13) =22848400a(14) =25775929a(15) =27447121a(16) =28826161a(17) =33292900a(18) =33454656a(19) =33512521a(20) =33988900a(21) =34316164a(22) =42549529a(23) =45643536a(24) =45859984a(25) =47969476a(26) =48177481a(27) =50509449a(28) =51122500