login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A025373 Numbers that are the sum of 4 nonzero squares in 8 or more ways. 6

%I #16 Aug 05 2021 07:27:38

%S 130,138,150,154,162,175,178,180,186,195,196,198,202,207,210,213,214,

%T 217,218,220,222,223,225,226,228,230,231,234,235,237,238,242,243,244,

%U 246,247,250,252,253,255,258,259,262,265,266,267,268,270,271,273,274,275,276,277

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

%H <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>

%F {n: A025428(n) >= 8}. - _R. J. Mathar_, Jun 15 2018

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

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

%K nonn

%O 1,1

%A _David W. Wilson_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 11:27 EDT 2024. Contains 371913 sequences. (Running on oeis4.)