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Amarnath Krishnamurthy
Mar 8, 2026, 3:02:19 AM (2 days ago) Mar 8
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A000891
Ratio of the product of the next n triangular numbers and the first n triangular numbers
3/1=3
(6*10)/(1*3)=20
(10*15*21)/(1*3*6)=175
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