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 A299708 #14 Mar 14 2021 14:25:41 %S A299708 325,1025,1445,1850,2210,3250,4625,4901,5185,5330,6725,6890,8650,9605, %T A299708 9802,11450,12545,13690,13925,14885,15130,16385,17425,17690,19045, %U A299708 20165,20450,21905,24650,26245,28225,29585,29930,30277,31330,33125,33490 %N A299708 Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1. %H A299708 Hugo Pfoertner, <a href="/A299708/b299708.txt">Table of n, a(n) for n = 1..10000</a> %e A299708 a(1) = 325 = A299707(1)^2 + 1 = 18^2 + 1 is expressible in two ways: %e A299708 325 = 17^2 + 6^2 = 15^2 + 10^2. %Y A299708 Cf. A050796, A299707, A300161, A300162, A300163, A300164, A300165, A300166. %K A299708 nonn %O A299708 1,1 %A A299708 _Hugo Pfoertner_, Feb 27 2018