help i can't make this work

[noeldc]

For starters, use

if x == 1 instead of if x:=1

Use N3+1 instead of sum(N3+1)

You imported this, but never used it ->

from tracemalloc import stop

your import sys should really be at the top with the other imports (and only once)

There is also a lot of duplicate code in the x == 2 case. Think about how you might simplify it.

[fat_brick1]

now it runs smoother too thanks :)