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 A335659 #4 Jul 08 2020 20:45:47
%S A335659 0,1,2,3,5,6,8,9,11,14,16,17,21,24,26,29,32,33,40,48,64,72,96,112,144,
%T A335659 160,192,240
%N A335659 Numbers that are not the sum of 3 nonzero squares and a positive 5th power.
%C A335659 No more terms up to 10^6.
%t A335659 n = 10^5;
%t A335659 t = Union@Flatten@Table[x^2 + y^2 + z^2 + w^5, {x, (n/3)^(1/2)}, {y, x, ((n-x^2)/2)^(1/2)}, {z, y, (n-x^2-y^2)^(1/2)}, {w, 1, (n-x^2-y^2-z^2)^(1/5)}];
%t A335659 Complement[Range[0, n], t]
%Y A335659 Cf. A000534, A004214, A273915.
%K A335659 nonn,more
%O A335659 1,3
%A A335659 _XU Pingya_, Jun 17 2020