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A116120
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Numbers n such that n concatenated with n-5 gives the product of two numbers which differ by 1.
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4
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7, 55, 5255, 6295, 75511, 92137, 5551405, 7943911, 1257669432489239675, 2148743977942130765, 2877834685014859837, 4164942361780146967, 10235898967817894552965, 15389481849681116007757
(list; graph; refs; listen; history; internal format)
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