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A111930
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Denominator of x(n) = Sum((odd part of k)/(k^2): 1<=k<=n).
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5
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1, 4, 12, 48, 240, 240, 1680, 6720, 20160, 4032, 44352, 44352, 576576, 576576, 2882880, 11531520, 196035840, 196035840, 3724680960, 3724680960, 3724680960, 3724680960, 85667662080, 85667662080, 428338310400, 428338310400
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OFFSET
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1,2
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COMMENTS
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Numerator of x(n) = A111929(n);
x(n) = A111929(n)/a(n) does not converge.
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REFERENCES
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G. Polya and G. Szego, Problems and Theorems in Analysis I (Springer 1924, reprinted 1972), Part Eight, Chap. 1, Sect. 6, Problem 50.
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LINKS
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Table of n, a(n) for n=1..26.
Eric Weisstein's World of Mathematics, Odd Part
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CROSSREFS
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Cf. A000265, A111919, A111921, A111923.
Sequence in context: A110594 A151483 A192622 * A197867 A013935 A149386
Adjacent sequences: A111927 A111928 A111929 * A111931 A111932 A111933
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KEYWORD
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nonn,frac
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AUTHOR
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Reinhard Zumkeller, Aug 21 2005
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STATUS
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approved
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