The number sequence is
73, 70, 49, 52, 35, ?, ?, ?, ?, ?, 72,.....
Can you fill in the gaps and predict what happens after 72?
I have updated the hints below.
Hint 1
What are the factors of each number? Calculate factors for each number!
Hint 2
This is a mathematical problem, but does not require complicated maths
Hint 3
If a sequence using exactly the same mathematical rules is started with a different number a different pattern develops. For example; [ 1, 1, 1, 1, ........ ] and [ 48, 48, 48, 48, ........]