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A115554
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Numbers k such that k^2 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
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OFFSET
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1,1
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LINKS
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EXAMPLE
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14287^2 = 2041_18369.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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