Squares containing only the digits 0, 4 or 8.

Terms

a(0) =0a(1) =4a(2) =400a(3) =484a(4) =40000a(5) =40804a(6) =48400a(7) =88804a(8) =4000000a(9) =4008004a(10) =4080400a(11) =4088484a(12) =4840000a(13) =4848804a(14) =8880400a(15) =400000000a(16) =400080004a(17) =400800400a(18) =400880484a(19) =408040000a(20) =408848400a(21) =484000000a(22) =484088004a(23) =484880400a(24) =840884004a(25) =888040000a(26) =40000000000a(27) =40000800004