Triangular Number
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Description
A triangular number or triangle number counts objects arranged in an equilateral triangle. Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The n th triangular number is the number of dots in the triangular arrangement with n dots on each side, and is equal to the sum of the n natural numbers from 1 to n. The sequence of triangular numbers, starting with the 0th triangular number, is
(sequence A000217 in the OEIS)
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- Slug: triangular-number
- Total Views: 515
- Added: Jul 20, 2024