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Ingy dot Net 2024-04-19 16:56:29 -07:00
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Task/Recamans-sequence/00-TASK.txt
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The '''[[wp:Recamán's sequence|Recamán's sequence]]''' generates Natural numbers.
Starting from a(0)=0, the n'th term <code>a(n)</code>, where n>0, is the previous term minus <code>n</code> i.e <code>a(n) = a(n-1) - n</code> but only if this is '''both''' positive ''and'' has not been previousely generated.<br>
Starting from a(0)=0, the n'th term <code>a(n)</code>, where n>0, is the previous term minus <code>n</code> i.e <code>a(n) = a(n-1) - n</code> but only if this is '''both''' positive ''and'' has not been previously generated.<br>
If the conditions ''don't'' hold then <code>a(n) = a(n-1) + n</code>.