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 A214329 #20 Feb 05 2016 20:38:00
%S A214329 2,3,5,6,8,9,10,11,12,13,14,17,18,19,20,21,22,24,25,26,27,29,30,32,33,
%T A214329 34,35,36,37,38,40,41,42,43,44,45,46,48,49,50,51,52,53,54,56,57,58,59,
%U A214329 61,62,65,66,67,68,69,70,72,73,74,75,76,77,78,80,81,82,83,84,85,86,88,89,90,91,93,94,96,97,98,99,100,101,102,104,105,106,107,108,109
%N A214329 Complement of A214328.
%C A214329 Numbers that are the sum of 2 or 3 nonzero squares. - _Altug Alkan_, Jan 13 2016
%H A214329 Chai Wah Wu, <a href="/A214329/b214329.txt">Table of n, a(n) for n = 1..10000</a>
%o A214329 (PARI) is2(n) = {for( i=1, #n=factor(n)~%4, n[1, i]==3 && n[2, i]%2 && return); n && ( vecmin(n[1, ])==1 || (n[1, 1]==2 && n[2, 1]%2))}
%o A214329 is3(n) = {my(a, b) ; a=1; while(a^2+1<n, b=1 ; while(b<=a && a^2+b^2<n, if(issquare(n-a^2-b^2), return(1) ) ; b++ ; ) ; a++ ; ) ; return(0) ; }
%o A214329 for(n=2, 1e3, if(is2(n) || is3(n), print1(n, ", "))); \\ _Altug Alkan_, Jan 13 2016
%Y A214329 Cf. A000404, A000408, A004214, A018825, A214328.
%K A214329 nonn
%O A214329 1,1
%A A214329 _N. J. A. Sloane_, Jul 26 2012, following a suggestion from Hans Isdahl, Apr 19 2012