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 A087459 #11 Feb 16 2025 08:32:51
%S A087459 2,4,6,6,12,10,8,20,10,24,14,30,28,12,30,40,18,42,14,36,56,22,16,42,
%T A087459 60,70,44,18,72,48,70,26,84,66,90,20,52,80,88,30,78,22,60,90,110,112,
%U A087459 60,126,104,24,66,132,34,126,130,144,68,26,154,120,110,140,156,38,102,28
%N A087459 Values (X + Y - Z) sorted on Z, then on Y, where (X,Y,Z) is a primitive Pythagorean triple with X<Y<Z.
%H A087459 Ray Chandler, <a href="/A087459/b087459.txt">Table of n, a(n) for n = 1..10000</a>
%H A087459 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PythagoreanTriple.html">Pythagorean Triple.</a>
%F A087459 a(n) = A046086(n) + A046087(n) - A020882(n) = 2*A014498(n).
%F A087459 a(n) = sqrt{2*A118961(n)*A118962(n)}. - _Lekraj Beedassy_, May 11 2006
%Y A087459 For ordered values of (X + Y - Z) see A020887.
%Y A087459 Cf. A046086, A046087, A020882, A014498.
%K A087459 nonn
%O A087459 1,1
%A A087459 _Lekraj Beedassy_, Oct 23 2003
%E A087459 Corrected and extended by _Ray Chandler_, Oct 25 2003