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A027762
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Denominator of Sum 1/p; p-1 | 2n.
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4
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6, 30, 42, 30, 66, 2730, 6, 510, 798, 330, 138, 2730, 6, 870, 14322, 510, 6, 1919190, 6, 13530, 1806, 690, 282, 46410, 66, 1590, 798, 870, 354, 56786730, 6, 510, 64722, 30, 4686, 140100870, 6, 30, 3318, 230010
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| From the Von Staudt-Clausen theorem, denominator(B_2n) = product of primes p such that (p-1)|2n.
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REFERENCES
| G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, 5th ed., Oxford Univ. Press, 1979, Th. 118.
H. Rademacher, Topics in Analytic Number Theory, Springer, 1973, Chap. 1.
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LINKS
| Index entries for sequences related to Bernoulli numbers.
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CROSSREFS
| Essentially same as A002445. Cf. A027761, A006954.
Sequence in context: A136375 A138706 A002445 * A151711 A130512 A127662
Adjacent sequences: A027759 A027760 A027761 * A027763 A027764 A027765
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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