Why is 204 a special number?
Answer (1)
31st Jan, 2023
204 can be stacked in a pyramid with a base that is an 8 by 8 square, making it a square pyramidal number. The fourth square triangular number is its square, which is 2042 = 41616. In addition to being a nonagonal number and a truncated triangular pyramid number, 204 is a figurate number. The Mian-Chowla sequence contains 204.
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