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Search: id:A144655
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| A144655 |
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Denominator of Sum_{k=1..n} k*H_{n+k} where H_m = Sum_{i=1..m}. |
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+0
2
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| 1, 2, 1, 1, 6, 4, 20, 5, 70, 56, 504, 420, 4620, 3960, 3432, 3003, 90090, 80080, 1361360, 408408, 369512, 67184, 470288, 1293292, 29745716, 27457584, 228813200, 212469400, 5736673800, 5354228880, 155272637520, 145568097675, 273491577450, 257403837600
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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0, 3/2, 6, 14, 155/6, 167/4, 1239/20, 433/5, 8109/70, 8389/56, ...
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CROSSREFS
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Suggested by A102720/A144653. Cf. A144654.
Sequence in context: A103880 A135899 A047920 this_sequence A140956 A166919 A143185
Adjacent sequences: A144652 A144653 A144654 this_sequence A144656 A144657 A144658
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KEYWORD
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nonn,frac
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 28 2009
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