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 A025307 #17 Jun 24 2025 12:53:27
%S A025307 5525,9425,11050,12025,12325,13325,14365,15725,17225,17425,18785,
%T A025307 18850,19825,21125,22100,22525,23725,24050,24505,24650,25925,26650,
%U A025307 26825,28730,28925,29725,31025,31265,31450,31525,32825,34450,34645,34850,35425,36125
%N A025307 Numbers that are the sum of 2 distinct nonzero squares in exactly 6 ways.
%C A025307 Where does this first differ from A025289? - _R. J. Mathar_, Jun 24 2025
%H A025307 Donovan Johnson, <a href="/A025307/b025307.txt">Table of n, a(n) for n = 1..1000</a>
%H A025307 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%t A025307 nn = 36125; t = Table[0, {nn}]; lim = Floor[Sqrt[nn - 1]]; Do[num = i^2 + j^2; If[num <= nn, t[[num]]++], {i, lim}, {j, i - 1}]; Flatten[Position[t, 6]] (* _T. D. Noe_, Apr 07 2011 *)
%K A025307 nonn
%O A025307 1,1
%A A025307 _David W. Wilson_