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A036248
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Denominator of fraction equal to the continued fraction [ 2, 3, 5, ..., prime(n) ].
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5
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1, 3, 16, 115, 1281, 16768, 286337, 5457171, 125801270, 3653694001, 113390315301, 4199095360138, 172276300080959, 7412079998841375, 348540036245625584, 18480034001016997327, 1090670546096248467877, 66549383345872173537824
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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Prime(4) = 7, and 2+1/(3+1/(5+1/7)) = 266/115, so a(4) = 115. - Jon E. Schoenfield, Dec 20 2016
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PROG
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(PARI) a(n)=if(n<0, 0, contfracpnqn(vector(n, i, prime(i)))[2, 1])
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CROSSREFS
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KEYWORD
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frac,easy,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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