|
Search: id:A035328
|
|
| |
|
| 0, 3, 30, 105, 252, 495, 858, 1365, 2040, 2907, 3990, 5313, 6900, 8775, 10962, 13485, 16368, 19635, 23310, 27417, 31980, 37023, 42570, 48645, 55272, 62475, 70278, 78705, 87780, 97527, 107970, 119133, 131040, 143715, 157182, 171465, 186588
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Bisection of A027480. For n>1, gives area of triangle two of whose cevians bound three smaller triangles with areas n-1, n, n+1 contiguously. - Lekraj Beedassy (blekraj(AT)yahoo.com), Dec 21 2006
|
|
REFERENCES
|
Neville, Jacobian Elliptic Functions, 2nd ed., p. 38.
Konrad Knopp, Theory and Application of Infinite Series, Dover, p. 269
|
|
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, inf, 1/a(n))=2ln(2)-1 - Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
|
|
CROSSREFS
|
Equals 3 * A000447.
Sequence in context: A012009 A001800 A152767 this_sequence A100259 A031205 A020874
Adjacent sequences: A035325 A035326 A035327 this_sequence A035329 A035330 A035331
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
EXTENSIONS
|
More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
|
|
|
Search completed in 0.002 seconds
|
