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 A025529 a(n) = (1/1 + 1/2 + ... + 1/n)*LCM{1,2,...,n}. 14
 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, 315404588903, 9227046511387 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS First column of A027446. - Eric Desbiaux, Mar 29 2013. REFERENCES Haight, Frank A., and Robert B. Jones. "A probabilistic treatment of qualitative data with special reference to word association tests." Journal of Mathematical Psychology 11.3 (1974): 237-244. [Denominators of fractions in Eq. 21.] LINKS Alois P. Heinz, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A001008(n)*A110566(n). - Arkadiusz Wesolowski, Mar 29 2012 MAPLE a:= n-> add(1/k, k=1..n)*ilcm(\$1..n): seq(a(n), n=1..30);  # Alois P. Heinz, Mar 14 2013 MATHEMATICA Table[HarmonicNumber[n]*LCM @@ Range[n], {n, 27}] (* Arkadiusz Wesolowski, Mar 29 2012 *) CROSSREFS Differs from A096617 at 7th term. Cf. A001008, A027446, A110566. Sequence in context: A001008 A231606 A096617 * A124078 A096795 A160039 Adjacent sequences:  A025526 A025527 A025528 * A025530 A025531 A025532 KEYWORD nonn AUTHOR 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, Jul 11 2009 STATUS approved

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