A131573 - OEIS

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A131573

Numbers whose square starts with 3 identical digits.

6

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

149^2 = 22201.

MATHEMATICA

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

CROSSREFS

Sequence in context: A107176 A140023 A105843 * A346891 A244661 A146137

Adjacent sequences: A131570 A131571 A131572 * A131574 A131575 A131576

KEYWORD

base,nonn

AUTHOR

Tanya Khovanova, Aug 28 2007

STATUS

approved