Offste Keyframes in C4D:
(num*2)+x
Assign values in Attribute manager:
num + whatever.
x = current value
tot = total amount of object selected
rnd(val) = random of maximum val
rnd(valmin;valmax)
more:
http://c4d.cn/help/US/html/6194.html (formula page)
http://c4d.cn/help/US/html/5822.html (attribute manager hot tips)