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A086655
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(C(2p,p)-2)/(2p) where p runs through the primes.
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1
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1, 3, 25, 245, 32065, 400023, 68635477, 930138521, 178987624513, 518401146543811, 7506908923471953, 23596358977508462295, 5180299766448679532059, 77180849825857621779893
(list; graph; refs; listen; history; internal format)
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