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A116326
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Numbers k such that k*(k+7) gives the concatenation of two numbers m and m+5.
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5
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8601, 9423, 35441, 64553, 73644, 4851412, 5148582, 8784946, 726216462985, 753613723259, 791909893642, 819307153916, 3654754464602947513, 4527063717215234299, 5472936282784765695, 6345245535397052481
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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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8784946 * 8784953 = 7717533//7717538, where // denotes concatenation.
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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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