Link: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Busy_beaver#The_busy_beaver_function_.CE.A3" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Busy_beaver#The_busy_beaver_fu...</a>