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 A025323 #38 Feb 16 2025 08:32:35
%S A025323 54,66,81,86,89,99,101,110,114,126,131,149,150,162,166,173,174,179,
%T A025323 182,185,186,216,219,221,222,225,227,233,237,241,242,245,258,264,274,
%U A025323 275,286,291,302,305,309,315,318,323,324,334,338,344,347,349,356,361,366,377,396
%N A025323 Numbers that are the sum of 3 nonzero squares in exactly 3 ways.
%H A025323 David A. Corneth, <a href="/A025323/b025323.txt">Table of n, a(n) for n = 1..1069</a> (first 418 terms from Robert Price, terms < 2*10^6)
%H A025323 David A. Corneth, <a href="/A025323/a025323_1.gp.txt">PARI program</a>
%H A025323 David A. Corneth, <a href="/A025323/a025323.gp.txt">Terms below (inclusive) 2*10^6 with the sums of squares</a>
%H A025323 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquareNumber.html">Square Number.</a>
%H A025323 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%F A025323 {n: A025427(n) = 3}. - _R. J. Mathar_, Aug 05 2022
%e A025323 182 is a term because 182 = 1^2 + 9^2 + 10^2 = 2^2 + 3^2 + 13^2 = 5^2 + 6^2 + 11^2 and there are no more such sums of three nonzero squares giving 182. - _David A. Corneth_, Feb 13 2019
%t A025323 Select[Range@ 400, Length@ # == 3 &@ DeleteCases[PowersRepresentations[#, 3, 2], _?(AnyTrue[#, # == 0 &] &)] &] (* _Michael De Vlieger_, Feb 13 2019 *)
%o A025323 (PARI) \\ See Corneth link. _David A. Corneth_, Feb 13 2019
%Y A025323 Cf. A024796, A025427, A025322, A025323, A025324, A025325, A025326, A025327, A025328, A025329, A025330, A025331, A025332, A025333, A025334, A025335, A025336, A025337, A025338.
%K A025323 nonn
%O A025323 1,1
%A A025323 _David W. Wilson_