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Search: id:A116260
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| A116260 |
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n times n+4 gives the concatenation of two numbers m and m-4. |
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6
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| 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999, 9999999999, 36363636362, 45454545453, 54545454544, 63636363635, 72727272726, 81818181817, 90909090908, 99999999999, 999999999999, 9999999999999
(list; graph; listen)
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