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The 3n+1 Problem
Start with a number. Then at each step, if
is even, compute
, and if
is odd, compute
. So far as anyone can tell, the resulting sequence always eventually reaches 1. But despite work since the 1930s, no proof is known.
Contributed by:
Stephen Wolfram
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The 3n+1 Problem
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http://demonstrations.wolfram.com/The3n1Problem/
Contributed by:
Stephen Wolfram
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