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Search: id:A081484
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| A081484 |
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Consider the mapping f(a/b) = (a^2 + b)/(a^2 - b). Taking a =2, b = 1 to start with and carrying out this mapping repeatedly on each new (reduced) rational number gives the following sequence 2/1,5/3,14/11,207/185,... Sequence contains the denominators. |
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| 1, 3, 11, 185, 21332, 462959957, 107185713294954842, 11488777233793645715382503248255559, 65996001163867589433635003347899702393519681139860824058982662496745
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