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A124432
a(n) = denominator of sum{k=1 to n} 1/H(k), H(k) =sum{j=1 to k}1/j.
+0
1
1, 1, 3, 33, 825, 113025, 5538225, 60920475, 46360481475, 330503872435275, 20160736218551775, 1687675389591187637025, 145175524688023551724527525, 166370135063802174111446471957325, 194941377468714112878127508925972294225
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.
AT&T Labs Research
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