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A069079 a(n) = (2n+1)(2n+2)(2n+4)(2n+5). 0
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; text; internal format)
OFFSET
0,1
REFERENCES
Konrad Knopp, Theory and application of infinite series, Dover, p. 268
LINKS
Konrad Knopp, Theorie und Anwendung der unendlichen Reihen, Berlin, J. Springer, 1922. (Original German edition of "Theory and Application of Infinite Series")
FORMULA
Sum_{n>=1} 1/a(n) = 1/36 Sum_{n>=1} (-1)^n/a(n) = 5/36 - log(2)/6.
MATHEMATICA
Table[16n^4+96n^3+196n^2+156n+40, {n, 0, 40}]
CROSSREFS
Sequence in context: A202902 A140045 A223162 * A093744 A109105 A269692
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 05 2002
STATUS
approved

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Last modified April 23 09:48 EDT 2024. Contains 371905 sequences. (Running on oeis4.)