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ABA n.  and  Ruth-Aaron pair

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First numbers that belong to both sets:

8, 24, 50, 1682, 9800, 1524258, 4929800, 123873800, 373464450, 1197561800, 82470788450, 98211868797, 153716272578, 343264122450, 427836550338, 981778806450.