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A276201
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Largest prime < A019518(n).
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0
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19, 233, 2351, 235699, 23571103, 2357111297, 235711131709, 23571113171891, 2357111317192243, 235711131719232929, 23571113171923293127, 2357111317192329313727, 235711131719232931374061, 23571113171923293137414303, 2357111317192329313741434739, 235711131719232931374143475271
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OFFSET
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2,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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a(5) = 235699, because this is the largest prime less than 235711 (concatenation of first 5 primes, written in decimal system).
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MATHEMATICA
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Table[NextPrime[FromDigits[Flatten[IntegerDigits[Prime[Range[n]]]]], -1], {n, 2, 17}]
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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