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A124291
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Largest prime < 10*a[n-1], a[1]=7.
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0
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7, 67, 661, 6607, 66067, 660661, 6606581, 66065773, 660657713, 6606577129, 66065771269, 660657712667, 6606577126663, 66065771266577, 660657712665739, 6606577126657373, 66065771266573693, 660657712665736927
(list; graph; refs; listen; history; internal format)
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