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A116342
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n times n+9 gives the concatenation of two numbers m and m+7.
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4
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4415, 5577, 7840, 3188375836088211088457055570, 4940200653606459263639537322, 5059799346393540736360462670, 6811624163911788911542944422, 6977607565571622928141284588
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