Squares with property that swapping first and last digits also gives a square.

Terms

a(0) =1a(1) =4a(2) =9a(3) =100a(4) =121a(5) =144a(6) =169a(7) =400a(8) =441a(9) =484a(10) =676a(11) =900a(12) =961a(13) =1521a(14) =1681a(15) =1764a(16) =4624a(17) =4761a(18) =5625a(19) =9409a(20) =10000a(21) =10201a(22) =10404a(23) =10609a(24) =11881a(25) =12321a(26) =14161a(27) =14641a(28) =16641a(29) =17161