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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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10
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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CROSSREFS
| Cf. Row sums of A187064 (conjecture) - Mats Granvik (mats.granvik(AT)abo.fi), Mar 13 2011.
Sequence in context: A175441 A001008 A096617 * A124078 A096795 A160039
Adjacent sequences: A025526 A025527 A025528 * A025530 A025531 A025532
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
| Removed the formulas involving sums of binomials.. they are wrong. sum{k=0..n, sum{j=0..k, binomial(k, j)(-1)^j/(j+1) }} != (1/1 + 1/2 + ... + 1/n) with any offset Stephen Crowley (crow(AT)crowlogic.net), Jul 11 2009
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