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Search: id:A048342
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| A048342 |
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Numbers n such that the concatenation of the numbers 1, 2, ..., n is a product of distinct primes. |
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4
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| 1, 3, 4, 5, 7, 10, 11, 13, 14, 15, 19, 21, 22, 23, 29, 30, 31, 33, 34, 37, 38, 39, 41, 42, 43, 46, 47, 49, 51, 55, 57, 58, 59, 61
(list; graph; listen)
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