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Old 2018-04-30, 06:43   #2
JeppeSN's Avatar
Jan 2016

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You are absolutely right. This is about primes 10*b^t + 1 for fixed b when t runs from 1 through infinity. You call it reversed Sierpiński?

I am extending A088783 as you suggested (see "History" of the entry until edits are approved).

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