 Project Euler problem zero

ID: project-euler-problem-zero

Ciro Santilli 40 Created 2025-10-14 Updated 2026-04-25

This was a registration CAPTCHA problem as of 2025:

Among the first 510 thousand square numbers, what is the sum of all the odd squares?

Bash + Python "one-liner":

python -c $'import sys;max=int(sys.argv[1]) + 1;s = 0\nfor i in range(1, max, 2):\n s += i*i\nprint(s)' 510000

With indentation:

s = 0
for i in range(1, 510001, 2):
    s += i*i
print(s)

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