A131573 - OEIS

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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

(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