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Search: id:A025529
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| A025529 |
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a(n) = (1/1 + 1/2 + ... + 1/n)*LCM{1,2,...,n}. |
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+0
8
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| 1, 3, 11, 25, 137, 147, 1089, 2283, 7129, 7381, 83711, 86021, 1145993, 1171733, 1195757, 2436559, 42142223, 42822903, 825887397, 837527025, 848612385, 859193865, 19994251455, 20217344325, 102157567401, 103187226801, 312536252003
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n)=A003418(n)*sum{k=0..n, sum{j=0..k, binomial(k, j)(-1)^j/(j+1) }} [offset 0] - Paul Barry (pbarry(AT)wit.ie), Aug 06 2004
a(n)=(n+1)*A003418(n)*sum{k=0..n, binomial(n, k)(-1)^k/(k+1)^2} [offset 0] - Paul Barry (pbarry(AT)wit.ie), Aug 06 2004
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CROSSREFS
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Adjacent sequences: A025526 A025527 A025528 this_sequence A025530 A025531 A025532
Sequence in context: A111935 A001008 A096617 this_sequence A124078 A096795 A160039
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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