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A036509
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Smallest square containing exactly n 2's.
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4
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25, 225, 22201, 2002225, 21022225, 212722225, 11222224225, 132922222225, 12222722202201, 22222220262025, 1222522204222225, 22292262226224225, 2222262262926922225, 22226224222205212225, 2222222222222640225, 22222262422274682222225, 1222212242622225512222224, 2220022223125222222222201
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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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FORMULA
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MATHEMATICA
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a[n_] := Block[{k=1}, While[DigitCount[k^2, 10, 2] != 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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a(13)-a(15) from Max Alekseyev, Oct 20 2008, Nov 10 2008, Dec 05 2008
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STATUS
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approved
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