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A116314
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Numbers n such that n times n+1 gives the concatenation of two numbers m and m+4.
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4
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28, 72, 79822845, 69852478553064869297984899963807, 77473062193002372448027740546439, 77747359197583788609974143907619, 84341826458653210947638195982115, 85367942837521291760016984490251
(list; graph; refs; listen; history; internal format)
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