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 A124966 #13 Oct 31 2019 13:48:05 %S A124966 9,17,18,25,26,27,29,33,34,36,38,41,45,49,50,51,53,54,57,59,61,62,65, %T A124966 66,68,69,72,73,74,75,77,81,82,83,85,86,89,90,94,97,98,99,100,101,102, %U A124966 104,105,106,107,108,109,110,113,114,116,117,118,121,122,123,125,126,129 %N A124966 Numbers which can be expressed as the ordered sum of 3 squares in 2 or more different ways. %H A124966 Robert Price, <a href="/A124966/b124966.txt">Table of n, a(n) for n = 1..83131</a> %F A124966 Equals = A000027 - A094942 - A004215. %e A124966 a(1)=9 because 9 = 3^2 + 0^2 + 0^2 or 2^2 + 2^2 + 1^2. %t A124966 Select[Range[129], Length@PowersRepresentations[#, 3, 2] >= 2 &] (* _Ray Chandler_, Oct 31 2019 *) %Y A124966 Cf. A004215, A094942, A124967-A124971. %K A124966 nonn %O A124966 1,1 %A A124966 _Artur Jasinski_, Nov 14 2006 %E A124966 Corrected and extended by _Ray Chandler_, Nov 30 2006