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Natural SciencesMathematicsPhysicsCombinatoricsGeometryNumber TheoryArithmetic GeometryCombinatorial Number TheoryGraph AlgorithmsGraph TheoryTopological Combinatorics
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The encyclopedia of integer sequences
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Choice Reviews Online · 1999 · 131 citations
Solution to advanced problem 3918
J. S. Frame · American Mathematical Monthly · 1941 · 73 citations