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A137049
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Numbers k such that k and k^2 use only the digits 1, 4, 5, 7 and 8.
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1
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1, 88, 888, 4141, 7471, 7588, 8471, 8878, 418878, 747588, 758141, 4145771, 8478141, 41458141, 41818878, 41855488, 74485888, 718158141, 744411478, 747541141, 878148141, 887574141, 888154141, 4144585478, 7444115471, 8454854141, 8881151478, 74711811488, 75877847588, 84745157471, 84785445771, 88155858878, 88157571888
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OFFSET
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1,2
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COMMENTS
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Generated with DrScheme.
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LINKS
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EXAMPLE
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718174181415471^2 = 515774154851781851481118151841.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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STATUS
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approved
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