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A272042
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a(n) = 2*prime(2n) - prime(n).
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1
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4, 11, 21, 31, 47, 61, 69, 87, 99, 113, 127, 141, 161, 171, 179, 209, 219, 241, 259, 275, 289, 307, 315, 357, 361, 377, 399, 419, 433, 449, 459, 491, 497, 535, 549, 567, 589, 603, 627, 645, 663, 685, 695, 721, 729
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OFFSET
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1,1
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LINKS
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FORMULA
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EXAMPLE
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For n=1, 2*prime(2*1)-prime(1) = 2*3 - 2 = 4.
For n=10, 2*prime(2*10)-prime(10) = 2*71 - 29 = 113.
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MATHEMATICA
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Table[2*Prime[2 n] - Prime[n], {n, 1, 45}]
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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