Squares composed of digits {2,5,9}.

Terms

a(0) =9a(1) =25a(2) =225a(3) =529a(4) =5929a(5) =29929a(6) =55225a(7) =99225a(8) =2295225a(9) =5929225a(10) =52229529a(11) =552955225a(12) =2952292225a(13) =9559559529a(14) =59299555225