A250715 Numbers of the form 7^x + y^7 with x, y >= 0.

1, 2, 7, 8, 49, 50, 129, 135, 177, 343, 344, 471, 2188, 2194, 2236, 2401, 2402, 2529, 2530, 4588, 16385, 16391, 16433, 16727, 16807, 16808, 16935, 18785, 18994, 33191, 78126, 78132, 78174, 78468, 80526, 94932, 117649, 117650, 117777, 119836, 134033, 195774

Offset: 1

Author

Vincenzo Librandi, Nov 27 2014

Keywords

• nonn

Examples

			50 is in this sequence because 7^2+1^7 = 50.
344 is in this sequence because 7^3+1^7 = 344.
		

Crossrefs

Cf. similar sequences listed in A250482.

Programs

Mathematica

nn=100; Union[Select[Flatten[Table[7^x + y^7, {x, 0, nn}, {y, 0, nn}]], #<=nn^7 &]]