Search: id:A051661
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%I A051661
%S A051661 1,2,3,4,5,6,8,9,10,12,15,16,18,20,23,24,25,27,30,34,35,36,37,38,39,42,
%T A051661 52,56,67,68,77,80,86,87,99,120,137,143,150,188
%N A051661 Experimental values for number of circles in packing equal circles into 
               a square for which there are no loose circles.
%D A051661 H. T. Croft, K. J. Falconer and R. K. Guy: Unsolved problems in geometry, 
               Springer, New York, 1991.
%H A051661 D. Boll, <a href="http://www.frii.com/~dboll/packing.html">Optimal Packing 
               Of Circles And Spheres</a>
%H A051661 E. Friedman, <a href="http://www.stetson.edu/~efriedma/packing.html">
               Erich's Packing Center</a>
%H A051661 C. D. Maranas, C. A. Floudas and P.M. Pardalos, <a href="http://www.inf.u-szeged.hu/
               ~pszabo/Packing_circles.html">New results in the packing of equal 
               circles in a square</a>, Discrete Mathematics 142 (1995), p. 287-293.
%H A051661 K. J. Nurmela and P. R. J. Ostergard, <a href="http://www.inf.u-szeged.hu/
               ~pszabo/Packing_circles.html">Packing up to 50 equal circles in a 
               square</a>, Discrete Comput. Geom. 18 (1997) 1, p. 111-120.
%H A051661 E. Specht, <a href="http://www.packomania.com/">www.packomania.com</a>
%Y A051661 Complement of A051660.
%Y A051661 Sequence in context: A010432 A097752 A014866 this_sequence A051037 A070023 
               A035303
%Y A051661 Adjacent sequences: A051658 A051659 A051660 this_sequence A051662 A051663 
               A051664
%K A051661 nonn
%O A051661 0,2
%A A051661 Eckard Specht (eckard.specht(AT)physik.uni-magdeburg.de)
%E A051661 I do not know how many of these values have been rigorously proved - 
               N. J. A. Sloane (njas(AT)research.att.com).

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