Squares n^2 whose decimal expansion contains n as a substring.

Terms

a(0) =1a(1) =25a(2) =36a(3) =100a(4) =625a(5) =2500a(6) =3600a(7) =5776a(8) =10000a(9) =62500a(10) =141376a(11) =250000a(12) =360000a(13) =390625a(14) =577600a(15) =1000000a(16) =6250000a(17) =14137600a(18) =14379264a(19) =25000000a(20) =36000000a(21) =39062500a(22) =57760000a(23) =87909376a(24) =100000000a(25) =214651801a(26) =625000000a(27) =1413760000a(28) =2500000000