1,2

Related to solubility of generalized Markov equation x_1^2 + x_2^2 + ... + x_n^2 = k*x_1*x_2*...*x_n.

The sequence is infinite as proved by Baoulina and Luca.

Table of n, a(n) for n=1..71.

I. Baoulina and F. Luca, On positive integers with a certain nondivisibility property, Annales Mathematicae et Informaticae 35 (2008), pp. 11-19.

Cf. A164014

Sequence in context: A018137 A084239 A283022 * A049708 A000031 A298072

Adjacent sequences: A219183 A219184 A219185 * A219187 A219188 A219189

nonn

Max Alekseyev, Nov 14 2012

approved