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A066622
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Concatenation of prime numbers in increasing order up to the n-th and then in decreasing order.
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2
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2, 232, 23532, 2357532, 2357117532, 23571113117532, 235711131713117532, 2357111317191713117532, 23571113171923191713117532, 235711131719232923191713117532, 2357111317192329312923191713117532
(list; graph; refs; listen; history; internal format)
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