A131573 Numbers whose square starts with 3 identical digits.

149, 298, 334, 472, 667, 745, 882, 1054, 1055, 1056, 1057, 1058, 1490, 1491, 1492, 1493, 1825, 1826, 1827, 2108, 2109, 2356, 2357, 2581, 2582, 2788, 2789, 2980, 2981, 3161, 3162, 3332, 3333, 3334, 3335, 3336, 3337, 3338, 3339, 3340, 3341, 3342, 3343

Offset: 1

Author

Tanya Khovanova, Aug 28 2007

Keywords

• base
• nonn

Examples

			149^2 = 22201.
		

Programs

Mathematica

Select[Range[10, 5000], Length[Union[Take[IntegerDigits[ #^2], 3]]] == 1 &]