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Search: id:A003681
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A003681 a(n) = min ( p +- q > 1 : pq = Product a(k), k = 1.. n-1).
(Formerly M0659) 		+0
20
2, 3, 5, 7, 11, 13, 17, 107, 197, 3293, 74057, 1124491, 1225063003, 48403915086083, 229199690093487791653, 139394989871393443893426292667, 2310767115930351361890156080500119173238113, 521722354210765171422123515738862106081757768167379798858040637 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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