Search: id:A007692
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%I A007692 M5299
%S A007692 50,65,85,125,130,145,170,185,200,205,221,250,260,265,290,305,325,338,
%T A007692 340,365,370,377,410,425,442,445,450,481,485,493,500,505,520,530,533,545,
%U A007692 565,578,580,585,610,625,629,650,680,685,689,697,725,730,740,745,754,765
%N A007692 Numbers that are the sum of 2 nonzero squares in 2 or more ways.
%D A007692 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007692 D. Wells, The Penguin Dictionary of Curious and Interesting Numbers. 
               Penguin Books, NY, 1986, 125.
%D A007692 Ming-Sun Li, Kathryn Robertson, Thomas J. Osler, Abdul Hassen, Christopher 
               S. Simons and Marcus Wright, "On numbers equal to the sum of two 
               squares in more than one way", Mathematics and Computer Education, 
               43 (2009), 102 - 108. [From Parthasarathy Nambi (PachaNambi(AT)yahoo.com), 
               Jul 27 2009]
%H A007692 <a href="Sindx_Su.html#ssq">Index entries for sequences related to sums 
               of squares</a>
%H A007692 D. J. C. Mackay and S. Mahajan, <a href="http://www.cs.toronto.edu/~mackay/
               sumsquares.pdf">Numbers that are Sums of Squares in Several Ways</
               a>
%H A007692 AskNRICH Archive, <a href="http://nrich.maths.org/askedNRICH/edited/76.html">
               Numbers expressible as the sum of 2 squares in more than one way</
               a>
%H A007692 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~twosquares.en.html">
               Two squares</a>
%Y A007692 Subsequence of A001481.
%Y A007692 Sequence in context: A062118 A167329 A109552 this_sequence A025285 A092541 
               A102803
%Y A007692 Adjacent sequences: A007689 A007690 A007691 this_sequence A007693 A007694 
               A007695
%K A007692 nonn,easy
%O A007692 1,1
%A A007692 N. J. A. Sloane (njas(AT)research.att.com).

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