A161902 Non-palindromic squares whose digit reversal gives a square (possibly with fewer digits).

100, 144, 169, 400, 441, 900, 961, 1089, 9801, 10000, 10404, 10609, 12100, 12544, 12769, 14400, 14884, 16900, 40000, 40401, 44100, 44521, 48400, 48841, 67600, 90000, 90601, 96100, 96721, 108900, 980100, 1000000, 1004004, 1006009, 1020100, 1022121, 1024144, 1026169, 1040400, 1042441

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1130

Mathematica

rsQ[n_]:=Module[{idn=IntegerDigits[n], ridn}, ridn=Reverse[idn]; ridn!=idn&&IntegerQ[Sqrt[FromDigits[ridn]]]]; Select[Range[2000]^2, rsQ]  (* Harvey P. Dale, Feb 02 2011 *)

Crossrefs

Sequence in context: A319440 A096598 A070760 * A153673 A258482 A004262

Adjacent sequences: A161899 A161900 A161901 * A161903 A161904 A161905

Keyword

nonn,base

Author

N. J. A. Sloane, Jan 30 2011

Extensions

More terms from Harvey P. Dale, Feb 02 2011

Status

approved