a(n)^2 is a square whose decimal expansion digits occur with an exact frequency of 3.

Terms

a(0) =10011a(1) =10110a(2) =10401a(3) =11001a(4) =11010a(5) =14499a(6) =20022a(7) =20220a(8) =22002a(9) =22020a(10) =28998a(11) =31086a(12) =333303a(13) =344514a(14) =354318a(15) =354996a(16) =360096a(17) =367854a(18) =379665a(19) =414189a(20) =442263a(21) =458499a(22) =458610a(23) =460719a(24) =462765a(25) =467997a(26) =470682a(27) =484173a(28) =492489a(29) =518484