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作問33 | ScratchStats
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作問33
YA
yayuyo_
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Created April 17, 2026
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三角数とは自然数nを用いてn(n+1)/2と表すことのできる数で、1,3,6,10,15,21,...が該当します
Project Details
Project ID
1308465354
Created
April 17, 2026
Last Modified
April 19, 2026
Shared
April 17, 2026
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