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8 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) Let R(n) = (10n - 1)/9 and Tn = the nth triangular number. The first 8 numbers generated by the formula TR(n) + 1 are prime. [Wesolowski]
Submitted: 2007-11-29 14:54:25; Last Modified: 2008-01-30 11:28:00.
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