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A194658
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a(n) is the maximal prime, such that for all primes x<=a(n) the number of primes in (x/2,x) is less than n.
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11
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2, 11, 17, 29, 41, 47, 59, 67, 71, 97, 101, 107, 109, 137, 151, 167, 179, 181, 191, 197, 233, 239, 241, 263, 269, 281, 283, 311, 347, 349, 367, 373, 401, 409, 419, 431, 433, 439, 461, 487, 491, 503, 521, 571, 587, 593, 599, 601, 607, 617, 643, 647, 653
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OFFSET
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1,1
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COMMENTS
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The next prime after a(n) is A080359(n+1).
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LINKS
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FORMULA
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MATHEMATICA
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b[1] = 2; b[n_] := b[n] = Module[{x = b[n-1]}, While[PrimePi[x] - PrimePi[ Quotient[x, 2]] != n, x++]; x];
a[n_] := NextPrime[b[n+1], -1];
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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