davidxkr

#Feedback from "El gran pregunton" !!!! 


c = 0
d = 0
5001.times do
    c += 1
    d = d + c
end

davidxkr

#Feedback from "El gran pregunton" !!!! 


c = 0
d = 0
5001.times do
    c += 1
    d = d + c
end

davidxkr

The following iterative sequence is defined for the set of positive integers:

n → n/2 (n is even)
n → 3n + 1 (n is odd)

Using the rule above and starting with 13, we generate the following sequence:
13 → 40 → 20 → 10 → 5 → 16 → 8 → 4 → 2 → 1

It can be seen that this sequence (starting at 13 and finishing at 1) contains 10 terms.