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Search: id:A116209
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| A116209 |
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Numbers n such that n concatenated with n+7 gives the product of two numbers which differ by 7. |
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6
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| 1, 13, 41, 653, 2287, 2723, 5491, 23240971, 26823191, 60249661, 1841968537, 2009317771, 3044234903, 3258336353, 8166731261, 9481619237, 1281071245505271100098621541, 1551605670846640136726379653
(list; graph; listen)
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