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A073123
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a(n) is the largest number such that pi(a(n)) = prime(n).
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2
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4, 6, 12, 18, 36, 42, 60, 70, 88, 112, 130, 162, 180, 192, 222, 250, 280, 292, 336, 358, 372, 408, 432, 462, 520, 556, 568, 592, 600, 618, 718, 742, 786, 808, 862, 880, 928, 970, 996, 1032, 1068, 1090, 1162, 1180, 1212, 1222, 1300, 1422, 1438, 1450, 1480
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OFFSET
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1,1
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COMMENTS
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Primes with prime subscripts correspond to least numbers m, such that pi(m) = prime(n).
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LINKS
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FORMULA
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EXAMPLE
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n=25: prime(25)=97; for 12 terms X = {509, 510, 511, 512, 513, 514, 515, 516, 517, 518, 519, 520}, pi(X)=97. Largest is a(25)=520, smallest is A006450(25), number of terms = A073124(25).
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MAPLE
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seq(ithprime(ithprime(n)+1)-1, n=1..100); # Robert Israel, May 14 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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