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A057130
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Product of first n primes of form 6k-1.
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3
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5, 55, 935, 21505, 623645, 25569445, 1201763915, 63693487495, 3757915762205, 266812019116555, 22145397586674065, 1970940385213991785, 199064978906613170285, 21299952743007609220495, 2406894659959859841915935, 315303200454741639290987485
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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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a(3) = 5*11*17 = 935.
a(4) = 21505 = 5 * 11 * 17 * 23.
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PROG
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(PARI) lista(nn) = {pp = 1; for (n = 1, nn, p = prime(n); if (Mod(p, 6) == -1, pp *= p; print1(pp, ", ")); ); } \\ Michel Marcus, Sep 08 2013
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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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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Oct 06 2000
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STATUS
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approved
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