A115669 -id:A115669 - cp's OEIS frontend

A115667 Squares whose digit reversal is a brilliant number (A078972).

4, 9, 121, 169, 400, 900, 961, 3481, 3721, 10201, 12100, 12544, 12769, 16384, 16900, 17161, 31684, 40000, 90000, 90601, 94249, 96100, 96721, 150544, 348100, 358801, 372100, 703921, 729316, 765625, 900601, 978121, 1006009, 1020100

Offset: 1

Giovanni Resta, Jan 31 2006

			3481=59^2 is a square and 1843=19*97 is brilliant.

Cf. A078972, A115668, A115669.

A115668 Brilliant numbers (A078972) whose digit reversal is a square.

Original entry on oeis.org

4, 9, 10, 121, 169, 961, 1273, 1843, 10201, 10609, 12769, 16171, 44521, 48361, 48613, 94249, 96721, 106009, 108853, 121879, 129307, 445051, 526567, 613927, 1026169, 1042441, 1062961, 1216609, 1442401, 1692601

Offset: 1

Giovanni Resta, Jan 31 2006

			1843=19*97 is brilliant and 3481=59^2 is a square.

Cf. A078972, A115667, A115669.

brilQ[n_]:=Module[{fin=FactorInteger[n]},Total[Transpose[fin][[2]]]==2&& Length[Union[IntegerLength[Transpose[fin][[1]]]]]==1]
brilnos=Select[Range[1700000],brilQ];
Select[brilnos,IntegerQ[Sqrt[FromDigits[Reverse[IntegerDigits[#]]]]]&]  (* Harvey P. Dale, Feb 06 2011 *)

cp's OEIS Frontend

A115667 Squares whose digit reversal is a brilliant number (A078972).

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