{"version":"1.0","type":"link","title":"Squared triangular number - Newikis","description":"In number theory, the sum of the first n cubes is the square of the nth triangular number. That is,","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/2/26/Nicomachus_theorem_3D.svg/1280px-Nicomachus_theorem_3D.svg.png","thumbnail_width":1280,"thumbnail_height":1280}