Let's see here...
N = ∑3 ≤ i ≤ 30 20i
N = 202 ∑1 ≤ i ≤ 28 20i
Now, the next step involves knowing that (x-1)(xn + xn-1 + … x1 + 1) = xn+1-1. So we have:
N = 202 (2029-1)/(20-1)
...which comes out to 11,302,545,200. Not even a trillion.
Other options:
Yes, and yes
Let's see here...
N = ∑3 ≤ i ≤ 30 20i
N = 202 ∑1 ≤ i ≤ 28 20i
Now, the next step involves knowing that (x-1)(xn + xn-1 + … x1 + 1) = xn+1-1. So we have:
N = 202 (2029-1)/(20-1)
...which comes out to 11,302,545,200. Not even a trillion.