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Search: id:A124432
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| A124432 |
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a(n) = denominator of sum{k=1 to n} 1/H(k), H(k) =sum{j=1 to k}1/j. |
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+0
1
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| 1, 1, 3, 33, 825, 113025, 5538225, 60920475, 46360481475, 330503872435275, 20160736218551775, 1687675389591187637025, 145175524688023551724527525, 166370135063802174111446471957325, 194941377468714112878127508925972294225
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OFFSET
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0,3
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MATHEMATICA
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f[n_] := Denominator[ Sum[ 1/HarmonicNumber[j], {j, n}]]; Table[ f[n], {n, 0, 14}] (*Chandler*)
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CROSSREFS
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Cf. A096987.
Sequence in context: A144756 A003715 A009690 this_sequence A126466 A002112 A055549
Adjacent sequences: A124429 A124430 A124431 this_sequence A124433 A124434 A124435
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KEYWORD
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frac,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Dec 15 2006
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net) and Robert G. Wilson v (rgwv(at)rgwv.com), Dec 16 2006
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