1278818

Appears in sequences

• Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x^2 + y^2 + z^2 = 3*x*y*z.at n=41A002559
• Non-Fibonacci Markoff numbers.at n=26A111032
• Composite Markoff numbers.at n=23A256395
• Irregular triangle read by rows: Maximal numbers of the Markoff triples at level L of the Markoff tree, with members of the triples ordered increasingly.at n=22A327345
• Alternative version of the Markov tree A327345.at n=27A368546