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A116261
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Numbers n such that n times n+5 gives the concatenation of two numbers m and m-4.
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5
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7, 97, 766, 857, 909, 997, 3284, 6712, 9997, 45451, 54545, 99997, 990099, 999997, 8181818, 9999997, 70588232, 99999997, 343130553, 362637362, 363636360, 420053630, 421052631, 497975708, 502024288, 578947365, 579946366
(list; graph; refs; listen; history; internal format)
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