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A066066
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a(n) = prime(2*n) - 2*prime(n).
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17
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-1, 1, 3, 5, 7, 11, 9, 15, 15, 13, 17, 15, 19, 21, 19, 25, 21, 29, 29, 31, 35, 35, 33, 45, 35, 37, 45, 49, 53, 55, 39, 49, 43, 59, 51, 57, 59, 57, 63, 63, 63, 71, 61, 71, 69, 81, 69, 57, 67, 83, 91, 91, 95, 91, 87, 87, 81, 99, 93, 97, 107, 97, 87, 97, 107, 109, 95, 95, 93, 111, 115, 109, 105, 111, 105, 115, 109, 117, 127, 123, 115
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OFFSET
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1,3
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COMMENTS
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Asymptotically, a(n) ~ log(4) n, with log(4) = 2 log 2 = 1.38629436111989... = A016627. - M. F. Hasler, Oct 19 2013
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LINKS
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MATHEMATICA
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Table[Prime[2n]-2Prime[n], {n, 100}] (* Harvey P. Dale, Aug 21 2016 *)
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PROG
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(PARI) { for (n = 1, 1000, a=prime(2*n) - prime(n)*2; write("b066066.txt", n, " ", a) ) } \\ Harry J. Smith, Nov 09 2009
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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