OFFSET
0,1
COMMENTS
AGM(x, y) is the arithmetic-geometric mean of Gauss and Legendre.
EXAMPLE
0.6092151504524492287304733713491660511183939228565999735...
PROG
(PARI) sumalt(k=0, (-1)^k/agm(1, 1+k))
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Daniel Hoyt, Jan 13 2020
STATUS
approved