Squares with digits in nonincreasing order.

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =64a(5) =81a(6) =100a(7) =400a(8) =441a(9) =841a(10) =900a(11) =961a(12) =6400a(13) =7744a(14) =8100a(15) =10000a(16) =40000a(17) =44100a(18) =84100a(19) =90000a(20) =96100a(21) =640000a(22) =774400a(23) =810000a(24) =1000000a(25) =4000000a(26) =4410000a(27) =8410000a(28) =8874441a(29) =9000000