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

1,1

Links

Table of n, a(n) for n=1..54.

Index entries for sequences related to sums of squares

Formula

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

Mathematica

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

Crossrefs

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

Sequence in context: A378313 A045049 A163555 * A025364 A294311 A252369

Adjacent sequences: A025370 A025371 A025372 * A025374 A025375 A025376

Keyword

nonn

Author

David W. Wilson

Status

approved