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Revision History for A025295 (Bold, blue-underlined text is an addition; faded, red-underlined text is a deletion.)

Showing entries 1-10 | older changes
Numbers that are the sum of 2 nonzero squares in 4 or more ways.
(history; published version)
#16 by Sean A. Irvine at Thu Aug 05 07:31:29 EDT 2021
STATUS

editing

approved

#15 by Sean A. Irvine at Thu Aug 05 07:30:46 EDT 2021
CROSSREFS
STATUS

approved

editing

#14 by Vaclav Kotesovec at Sat Feb 27 08:23:47 EST 2016
STATUS

editing

approved

#13 by Vaclav Kotesovec at Sat Feb 27 08:10:15 EST 2016
LINKS

Vaclav Kotesovec, <a href="/A025295/b025295.txt">Table of n, a(n) for n = 1..1500</a>

STATUS

approved

editing

#12 by Charles R Greathouse IV at Sun Aug 03 14:01:14 EDT 2014
MATHEMATICA

nn = 7250; t = Table[0, {nn}]; lim = Floor[Sqrt[nn - 1]]; Do[num = i^2 + j^2; If[num <= nn, t[[num]]++], {i, lim}, {j, i}]; Flatten[Position[t, _?(# >= 4 &)]] (* _T. D. Noe, _, Apr 07 2011 *)

Discussion
Sun Aug 03
14:01
OEIS Server: https://oeis.org/edit/global/2267
#11 by Russ Cox at Fri Mar 30 18:35:24 EDT 2012
AUTHOR

_David W. Wilson (davidwwilson(AT)comcast.net)_

Discussion
Fri Mar 30
18:35
OEIS Server: https://oeis.org/edit/global/202
#10 by Russ Cox at Sun Jul 10 18:21:51 EDT 2011
LINKS

<a href="/Sindx_index/Su.html#ssq">Index entries for sequences related to sums of squares</a>

Discussion
Sun Jul 10
18:21
OEIS Server: https://oeis.org/edit/global/87
#9 by T. D. Noe at Thu Apr 07 15:41:34 EDT 2011
STATUS

proposed

approved

#8 by T. D. Noe at Thu Apr 07 15:41:21 EDT 2011
MATHEMATICA

nn = 7250; t = Table[0, {nn}]; lim = Floor[Sqrt[nn - 1]]; Do[num = i^2 + j^2; If[num <= nn, t[[num]]++], {i, lim}, {j, i}]; Flatten[Position[t, _?(# >= 4 &)]] (* T. D. Noe, Apr 07 2011 *)

STATUS

approved

proposed

#7 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010
LINKS

<a href="/Sindx_Su.html#ssq">Index entries for sequences related to sums of squares</a>

KEYWORD

nonn,new

nonn