Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- n = int(input("last num in series:\n"))
- sum1 = sum([n*(n+1)*(2*n+1)/6])
- sum2 = sum([n*(n+1)/2])
- Ans = (sum1+sum2)/2
- print(Ans)
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement