References to A002559

Markoff (or Markov) numbers: union of numbers x, y, z satisfying x^2 + y^2 + z^2 = 3xyz.
1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, 1597, 2897, 4181, 5741

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