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A069079
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(2n+1)(2n+2)(2n+4)(2n+5).
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0
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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; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| Konrad Knopp, Theory and application of infinite series, Dover, p. 268
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LINKS
| 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
| 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
| Sequence in context: A177096 A202902 A140045 * A093744 A109105 A107419
Adjacent sequences: A069076 A069077 A069078 * A069080 A069081 A069082
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KEYWORD
| easy,nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
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