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 A340790 #8 Jan 21 2021 10:06:17 %S A340790 1120,5544,5656,5040,5775,7665,935,7920,7975,1716,9360,9516,11700, %T A340790 44880,46380,14040,53856,55656,17325,100320,101805,3315,107712,107763, %U A340790 70560,96525,119565,11088,132825,133287,30240,141284,144484,47424,150480,157776,106227,237120,259827 %N A340790 Pythagorean triples (X, Y, Z) that are the componentwise products of 2 primitive Pythagorean triples (x,y,z) and (r,s,t), that is, X=x*r, Y=y*s, ordered by increasing Z. %H A340790 Lorenz Halbeisen and Norbert Hungerbühler, <a href="https://arxiv.org/abs/2101.08163">Pairing Pythagorean Pairs</a>, arXiv:2101.08163 [math.NT], 2021. %e A340790 [7, 24, 25] X [160, 231, 281] = [7*160, 24*25, 5656] = [1120, 5544, 5656]. %Y A340790 Cf. A020882, A046086, A046087. %K A340790 nonn,tabf %O A340790 1,1 %A A340790 _Michel Marcus_, Jan 21 2021