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A064109
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Product_{k=1..n} p(k) - p(4n), where p(i) = i-th prime.
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| It is known that a(n) > 0 for n >= 4.
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REFERENCES
| S. E. Mamangakis, Synthetic proofs of some prime number inequalities, Duke Math. J., 29 (1962), 471-473.
D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, Section VII.18, p. 493.
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,100
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PROG
| (PARI) { p=1; for (n=1, 100, p*=prime(n); write("b064109.txt", n, " ", p - prime(4*n)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 07 2009]
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CROSSREFS
| Sequence in context: A088315 A138296 A094474 * A175484 A156682 A089534
Adjacent sequences: A064106 A064107 A064108 * A064110 A064111 A064112
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 16 2001
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