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A036511
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Smallest square containing exactly n 4's.
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4
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4, 144, 1444, 44944, 6441444, 47444544, 4434494464, 44424414441, 4243443441444, 44844344414464, 444431244445444, 44044624434444544, 441544444344443449, 14444545446449449444, 346454444084444444644, 44024844440444424044544, 444448493447444044441744
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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a[n_] := Block[{k=1}, While[DigitCount[k^2, 10, 4] != n, k++]; k^2]; Array[a, 7] (* Giovanni Resta, Jul 27 2018 *)
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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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EXTENSIONS
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STATUS
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approved
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