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Ulam numbers: Difference between revisions
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<big><big> u<sub>2</sub> = 2 </big></big>
We define the <big> n<sup>th</sup> </big> Ulam number <big> u<sub>n</sub> </big> as the smallest number that is greater than <big> u<sub>n-1</sub> </big> and
<br>is the unique sum of two different Ulam numbers <big> u<sub>i (<n)</sub> </big> and <big> u<sub>j (<n)</sub></big>.
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