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3, 4, 5, 6, 7, 8, 9, 9, 10, 11, 12, 13, 13, 14, 14, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 21, 21, 21, 21, 22, 23, 23, 24, 24, 25, 25, 26, 26, 26, 27, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 31, 31, 32, 32, 33, 33, 33, 33, 34, 34, 34, 35, 36, 36, 36, 36, 37
(list;
graph;
refs;
listen;
history;
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internal format)
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OFFSET
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1,1
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COMMENTS
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A117767(n) = 2*floor(sqrt(prime(n))) + 1 <= a(n);
Andrica's conjecture: a(n) <= A001223(n).
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LINKS
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MATHEMATICA
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PROG
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(Haskell)
a247485 = (+ 1) . floor . (* 2) . sqrt . fromIntegral . a000040
(PARI) a(n) = 1+sqrtint(4*prime(n)); \\ Michel Marcus, Aug 26 2021
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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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