Numbers k such that k^2 has k as its middle digits.

Terms

a(0) =1a(1) =50a(2) =60a(3) =250a(4) =3792a(5) =7600a(6) =376000a(7) =495475a(8) =625000a(9) =971582a(10) =66952741a(11) =93760000a(12) =177656344a(13) =3199268655a(14) =9062500000a(15) =10937600000a(16) =788138178328a(17) =860628177919a(18) =890625000000