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 A034047 #9 Jul 08 2025 20:05:13 %S A034047 0,1,2,3,4,5,6,8,10,11,12,13,14,16,17,19,20,21,22,24,26,29,30,32,33, %T A034047 34,35,36,37,38,40,41,42,43,44,46,48,51,52,53,56,57,58,59,61,62,64,65, %U A034047 66,67,68,69,70,72,73,74,76,77,78,80,82,83,84,85,86,88,89,91,93 %N A034047 Numbers that are primitively or imprimitively represented by x^2+y^2+z^2, but not both. %F A034047 Union of A034046 and A034047 is A000378. Union of A034044 and A034045 is A034047. Numbers that are in A000378 and either squarefree or congruent to 0 mod 4. - _Ray Chandler_, Sep 05 2004 %Y A034047 Cf. A000378, A004215, A047449, A034043-A034046. %K A034047 nonn %O A034047 1,3 %A A034047 _N. J. A. Sloane_