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 A097225 #18 Dec 30 2019 15:09:51
%S A097225 1625,2125,3250,3625,4250,4625,4875,5125,6375,6500,6625,7250,7625,
%T A097225 8500,9125,9250,9750,10250,10875,10985,11125,11375,12125,12625,12750,
%U A097225 13000,13250,13625,13875,14125,14500,14625,14875,15250,15375,17000,17125
%N A097225 Numbers n that are the hypotenuse of exactly 10 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 10 ways.
%C A097225 If m is a term, then 2*m and p*m are terms where p is any prime of the form 4k+3. - _Ray Chandler_, Dec 30 2019
%H A097225 Ray Chandler, <a href="/A097225/b097225.txt">Table of n, a(n) for n = 1..10000</a>
%t A097225 r[n_] := Reduce[0 < x <= y && n^2 == x^2 + y^2, {x, y}, Integers]; Reap[For[n = 5, n <= 20000, n++, rn = r[n]; If[rn =!= False, If[Length[r[n]] == 10, Print[n]; Sow[n]]]]][[2, 1]] (* _Jean-François Alcover_, Nov 15 2016 *)
%Y A097225 Cf. A004144 (0), A084645 (1), A084646 (2), A084647 (3), A084648 (4), A084649 (5), A097219 (6), A097101 (7), A290499 (8), A290500 (9), A290501 (11), A097226 (12), A097102 (13), A290502 (14), A290503 (15), A097238 (16), A097239 (17), A290504 (18), A290505 (19), A097103 (22), A097244 (31), A097245 (37), A097282 (40), A097626 (67).
%K A097225 nonn
%O A097225 1,1
%A A097225 _James R. Buddenhagen_, Sep 17 2004