OFFSET
1,2
EXAMPLE
Sum_{k>=1} 1/(k!!)^(k!!) = 1.28703709664168181471132029755820425904216955340222081026798765926909...
MATHEMATICA
RealDigits[N[Sum[1/n^n, {n, 1, 100}], 200]][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Artur Jasinski, Nov 14 2007
STATUS
approved