A025373 Numbers that are the sum of 4 nonzero squares in 8 or more ways.

130, 138, 150, 154, 162, 175, 178, 180, 186, 195, 196, 198, 202, 207, 210, 213, 214, 217, 218, 220, 222, 223, 225, 226, 228, 230, 231, 234, 235, 237, 238, 242, 243, 244, 246, 247, 250, 252, 253, 255, 258, 259, 262, 265, 266, 267, 268, 270, 271, 273, 274, 275, 276, 277

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Links

• Index entries for sequences related to sums of squares

Crossrefs

Cf. A025336, A025364, A025372, A025374, A344801, A345152.

Programs

Mathematica

selQ[n_] := Length[ Select[ PowersRepresentations[n, 4, 2], Times @@ # != 0 &]] >= 8; Select[ Range[300], selQ] (* Jean-François Alcover, Oct 03 2013 *)

Formula

{n: A025428(n) >= 8}. - R. J. Mathar, Jun 15 2018