%I A002839 M1658 N0650
%S A002839 0,0,0,0,0,0,0,0,2,6,22,67,213,744,2609,9016,31426,110381
%N A002839 Number of perfect squared rectangles of order n.
%C A002839 The order of a squared rectangle is the number of squares into which 
               it is divided.
%D A002839 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002839 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002839 C. J. Bouwkamp, personal communication.
%D A002839 C. J. Bouwkamp and A. J. W. Duijvestijn, Catalogue of Simple Perfect 
               Squared Squares of Orders 21 Through 25. Eindhoven Univ. Technology, 
               Dept. of Math., Report 92-WSK-03, Nov. 1992.
%D A002839 C. J. Bouwkamp and A. J. W. Duijvestijn, Album of Simple Perfect Squared 
               Squares of order 26, Eindhoven University of Technology, Faculty 
               of Mathematics and Computing Science, EUT Report 94-WSK-02, December 
               1994.
%D A002839 M. Gardner, The 2nd Scientific American Book of Mathematical Puzzles 
               and Diversions. Simon and Schuster, NY, 1961, p. 207.
%D A002839 M. E. Lines, Think of a Number, pp. 43 Institute of Physics, London 1990.
%H A002839 S. E. Anderson, <a href="http://www.squaring.net">Perfect Squared Rectangles 
               and Squared Squares</a>
%H A002839 D. Moews, <a href="http://xraysgi.ims.uconn.edu:8080/squared-rectangles.html">
               Squared rectangles</a>
%H A002839 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PerfectRectangle.html">Link to a section of The World of Mathematics.</
               a>
%Y A002839 Cf. A006983, A002962, A002881, A014530.
%Y A002839 Sequence in context: A147800 A027561 A126171 this_sequence A109194 A014334 
               A107239
%Y A002839 Adjacent sequences: A002836 A002837 A002838 this_sequence A002840 A002841 
               A002842
%K A002839 nonn,nice,hard
%O A002839 1,9
%A A002839 N. J. A. Sloane (njas(AT)research.att.com).