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A147615
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13, 13+4!, 13+4!+5!, 13+4!+5!+6!, ...
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1
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13, 37, 157, 877, 5917, 46237, 409117, 4037917, 43954717, 522956317, 6749977117, 93928268317, 1401602636317, 22324392524317, 378011820620317, 6780385526348317, 128425485935180317, 2561327494111820317, 53652269665821260317, 1177652997443428940317
(list; graph; refs; listen; history; internal format)
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