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 A067710 n! sum{k|n} (sum{j=1 to k} 1/j); the k-sum is over the positive divisors, k, of n. 1
 1, 5, 17, 110, 394, 4884, 18108, 294384, 2054736, 27986400, 160460640, 5733590400, 26029779840, 727452230400, 11030096851200, 223495556659200, 1579093018675200, 83918534992588800, 553210247226470400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA E.g.f.: Sum_{k>0} log(1-x^k)/(x^k-1). - Vladeta Jovovic, Aug 01 2004 EXAMPLE a(6) = 6! *(1 +(1 +1/2) +(1 +1/2 +1/3) +(1 +1/2 +1/3 +1/4 +1/5 +1/6)) because 1, 2, 3 and 6 are the divisors of 6. CROSSREFS Sequence in context: A234797 A062586 A301641 * A197912 A203114 A198027 Adjacent sequences:  A067707 A067708 A067709 * A067711 A067712 A067713 KEYWORD nonn AUTHOR Leroy Quet, Feb 05 2002 STATUS approved

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Last modified January 19 09:35 EST 2019. Contains 319306 sequences. (Running on oeis4.)