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 A099829 #13 Feb 16 2025 08:32:55 %S A099829 12,60,120,240,420,720,840,840,1680,1680,2520,2520,4620,5040,5040, %T A099829 5040,9240,9240,9240,9240,18480,18480,18480,18480,18480,27720,27720, %U A099829 27720,27720,27720,27720,55440,55440,55440,55440,55440,55440,55440,55440 %N A099829 Smallest perimeter S such that at least n distinct Pythagorean triangles with this perimeter can be constructed. %H A099829 Ray Chandler, <a href="/A099829/b099829.txt">Table of n, a(n) for n = 1..279</a> %H A099829 Ron Knott, <a href="http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Pythag/pythag.html">Pythagorean Triples and Online Calculators</a> %H A099829 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PythagoreanTriple.html">Pythagorean Triple.</a> %H A099829 <a href="/index/Ps#PyTrip">Index entries related to Pythagorean Triples.</a> %e A099829 a(3)=120 because 120 is the smallest possible perimeter for which 3 different Pythgorean triangles exist: 120=20+48+52=24+45+51=30+40+50. %Y A099829 Cf. A099830 first perimeter with exact match of number of Pythagorean triangles, A009096 ordered perimeters of Pythagorean triangles. %K A099829 nonn %O A099829 1,1 %A A099829 _Hugo Pfoertner_, Oct 27 2004 %E A099829 More terms from _Ray Chandler_, Oct 29 2004