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A025373 Numbers that are the sum of 4 nonzero squares in 8 or more ways. 1
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 (list; graph; refs; listen; history; text; internal format)
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-Fran├žois Alcover, Oct 03 2013 *)

CROSSREFS

Sequence in context: A025372 A045049 A163555 * A025364 A294311 A252369

Adjacent sequences:  A025370 A025371 A025372 * A025374 A025375 A025376

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 21 06:55 EDT 2019. Contains 328292 sequences. (Running on oeis4.)