a(n)^2 is a square whose digits occur with an equal minimum frequency of 2.

Terms

a(0) =88a(1) =478a(2) =577a(3) =583a(4) =715a(5) =836a(6) =880a(7) =881a(8) =893a(9) =3362a(10) =3386a(11) =3911a(12) =4077a(13) =4780a(14) =5077a(15) =5239a(16) =5369a(17) =5770a(18) =5784a(19) =5789a(20) =5830a(21) =5858a(22) =6523a(23) =6756a(24) =6772a(25) =6926a(26) =6941a(27) =7107a(28) =7150a(29) =7359