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A158912
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Primitive numbers n whose square can be represented as a four "digit" repdigit number in some base < n.
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1
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20, 1218, 7540, 20280, 1373090, 4903600, 23308460, 316540365, 527813814, 4091661910, 16718044954, 1034412600, 142903074740, 1827252574658, 31036383127940
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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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20^2 = 1111 in base 7
1218^2 = (21)(21)(21)(21) in base 41
7540^2 = (58)(58)(58)(58) in base 99
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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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