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%I #8 Nov 27 2014 04:07:11
%S 1,2,7,8,49,50,129,135,177,343,344,471,2188,2194,2236,2401,2402,2529,
%T 2530,4588,16385,16391,16433,16727,16807,16808,16935,18785,18994,
%U 33191,78126,78132,78174,78468,80526,94932,117649,117650,117777,119836,134033,195774
%N Numbers of the form 7^x + y^7 with x, y >= 0
%e 50 is in this sequence because 7^2+1^7 = 50.
%e 344 is in this sequence because 7^3+1^7 = 344.
%t nn=100; Union[Select[Flatten[Table[7^x + y^7, {x, 0, nn}, {y, 0, nn}]], #<=nn^7 &]]
%Y Cf. similar sequences listed in A250482.
%K nonn
%O 1,2
%A _Vincenzo Librandi_, Nov 27 2014