Göbel's sequence

The is a sequence of rational numbers, in which the first non-integral term is so large, that writing the integral part of its decimal expansion takes longer than a human life, since it has 178,485,291,568 digits.MathWorld, Göbel's Sequence
It starts with 1; 1; 2; 3; 5; 10; 28; 154; 3,520; 1,551,880; 267,593,772,160; 7,160,642,690,122,633,501,504… ().
== Sources ==
Category:Numbers
Category:Class 3
Category:Eponymous numbers
Category:Lower class 3
Category:Non-decimal fractions