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A115554
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Numbers n such that the square of n is the concatenation of two numbers m and 9*m.
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0
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14287, 28574, 15384615384615386, 23076923076923079, 30769230769230772, 14285714285714285714285714285714285714285714287, 28571428571428571428571428571428571428571428574
(list; graph; refs; listen; history; internal format)
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