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41 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The 41st heptagonal number (r(5r-3)/2, for r=41) is the concatenation of 41 with itself. [Heleen]
Submitted: 1999-09-02 18:40:00; Last Modified: 2009-08-06 06:54:47.
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