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A064109
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Product_{k=1..n} prime(k) - prime(4n).
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1
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-5, -13, -7, 157, 2239, 29941, 510403, 9699559, 223092719, 6469693057, 200560489937, 7420738134587, 304250263526971, 13082761331669767, 614889782588491129, 32589158477190044419, 1922760350154212638733, 117288381359406970982911
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OFFSET
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1,1
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COMMENTS
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It is known that a(n) > 0 for n >= 4.
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REFERENCES
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D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, Section VII.18, p. 493.
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LINKS
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PROG
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(PARI) a(n) = prod(k=1, n, prime(k)) - prime(4*n); \\ Michel Marcus, Jun 19 2018
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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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