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Search: id:A069079
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| A069079 |
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(2n+1)(2n+2)(2n+4)(2n+5). |
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+0
1
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| 40, 504, 2160, 6160, 14040, 27720, 49504, 82080, 128520, 192280, 277200, 387504, 527800, 703080, 918720, 1180480, 1494504, 1867320, 2305840, 2817360, 3409560, 4090504, 4868640, 5752800, 6752200, 7876440, 9135504, 10539760, 12099960
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Konrad Knopp, Theory and application of infinite series, Dover, p. 268
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LINKS
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Konrad Knopp, Theorie und Anwendung der unendlichen Reihen, Berlin, J. Springer, 1922. (Original german edition of "Theory and Application of Infinite Series")
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FORMULA
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sum(n=1, inf, 1/a(n))=1/36 sum(n=1, inf, (-1)^n/a(n))=5/36-ln(2)/6
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CROSSREFS
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Sequence in context: A055750 A115189 A140045 this_sequence A093744 A109105 A107419
Adjacent sequences: A069076 A069077 A069078 this_sequence A069080 A069081 A069082
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
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