This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A086326 #13 Apr 25 2025 20:59:04 %S A086326 3,6,15,39,87,102,267,507,582,699,1299,1830,2955,3975,4791,8691,12543, %T A086326 17223,19398,22683,27231,32838,44103,85971,100383,112998,129783, %U A086326 154923,186630,225075,289671,405411,585075,589254,884055,1279167,1498179,1542687,1938054,2777295,3410067,3836454 %N A086326 Markoff numbers (A002559) multiplied by 3. %C A086326 Numbers n such that the Diophantine equation x^2+y^2+z^2 = x*y*z = n can be solved. %C A086326 A list of x's in nondecreasing order over all solutions of x^2+y^2+z^2 = x*y*z, with x >= y >= z. %C A086326 x,y,z is a solution of x^2+y^2+z^2 = 3x*y*z if and only if 3x,3y,3z is a solution of x^2+y^2+z^2 = x*y*z. %e A086326 a(1)=1, a(2)=6, a(3)=15, for (3,3,3), (6,3,3) and (15,6,3) are solutions of x^2+y^2+z^2 = x*y*z. %K A086326 nonn %O A086326 1,1 %A A086326 Antoine Verroken (antoine.verroken(AT)pandora.be), Aug 27 2003