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Answers
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3
Important open problems that have already been reduced to a finite but infeasible amount of computation
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Spanning trees in planar graphs
5
Prime numbers p not of the form ab + bc + ac (0 < a < b < c ) (and related questions)
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Asymptotics for the number of ways to sum primes such that the sum is <= n
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Asymptotics for the number of partitions of $n$ into odd prime parts
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Is this a counterexample to a conjecture about independent domination in cartesian graph products?
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What is the effect of adding one edge on the number of spanning trees of a given graph ?
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Definition of convex cycles