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:It was not removed for lack of proof. It was removed for lack of a published source. Also, 10, 45, 136, etc., are not squared triangular numbers. —[[User:David Eppstein|David Eppstein]] ([[User talk:David Eppstein|talk]]) 16:14, 7 April 2022 (UTC)
:::They are triangular numbers of squares [[User:KlokkoVanDenBerg|KlokkoVanDenBerg]] ([[User talk:KlokkoVanDenBerg|talk]]) 17:38, 7 April 2022 (UTC)
::::Like how 10 is the 4th triangular number, 45 is the 9th triangular number, 136 is the 16th, and so on. [[User:KlokkoVanDenBerg|KlokkoVanDenBerg]] ([[User talk:KlokkoVanDenBerg|talk]]) 17:40, 7 April 2022 (UTC)
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