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A085871
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a(1) = 2, a(2n) = smallest prime of the form k*a(2n-1) +1, k >1, a(2n+1) = smallest prime of the form r*a(2n)-1, r >1.
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1
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2, 5, 19, 191, 4201, 67217, 403301, 4839613, 38716903, 464602837, 27876170219, 55752340439, 4014168511607, 24085011069643, 578040265671431, 18497288501485793, 73989154005943171, 2663609544213954157
(list; graph; refs; listen; history; internal format)
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