OFFSET
0,2
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)^(n+1)/a(n) = log(2) - 1/2 (A187832). [Corrected by Amiram Eldar, Mar 08 2022]
MATHEMATICA
a[n_] := n*(4*n^4 + 1); Array[a, 40, 0] (* Amiram Eldar, Mar 08 2022 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 05 2002
STATUS
approved