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A116243
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n times n+7 gives the concatenation of two numbers m and m-7.
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5
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38, 56, 32262230, 67737764, 79321054, 3341093417798787499091, 3861488851737861033959, 4747922651210186579785, 5252077348789813420209, 6138511148262138966035, 6658906582201212500903, 7232275368591793618229
(list; graph; refs; listen; history; internal format)
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