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 A250715 #10 Jun 02 2025 10:17:01
%S A250715 1,2,7,8,49,50,129,135,177,343,344,471,2188,2194,2236,2401,2402,2529,
%T A250715 2530,4588,16385,16391,16433,16727,16807,16808,16935,18785,18994,
%U A250715 33191,78126,78132,78174,78468,80526,94932,117649,117650,117777,119836,134033,195774
%N A250715 Numbers of the form 7^x + y^7 with x, y >= 0.
%e A250715 50 is in this sequence because 7^2+1^7 = 50.
%e A250715 344 is in this sequence because 7^3+1^7 = 344.
%t A250715 nn=100; Union[Select[Flatten[Table[7^x + y^7, {x, 0, nn}, {y, 0, nn}]], #<=nn^7 &]]
%Y A250715 Cf. similar sequences listed in A250482.
%K A250715 nonn
%O A250715 1,2
%A A250715 _Vincenzo Librandi_, Nov 27 2014