%I A037189
%S A037189 0,0,3,4,6,4,13,13,7,16,8,23,36,58,92,101,172,281,337,541,746
%N A037189 Number of ways of placing 4n points on 2n X 2n grid so no 3 are in a 
               line (solutions with either 90 degree rotational symmetry or full 
               symmetry).
%D A037189 A. Flammenkamp, Progress in the no-three-in-line problem, J. Combinat. 
               Theory A 60 (1992), 305-311.
%D A037189 A. Flammenkamp, Progress in the no-three-in-line problem. II. J. Combin. 
               Theory Ser. A 81 (1998), no. 1, 108-113.
%H A037189 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/no3in/
               table_old.txt">Solutions of the no-three-in-line problem</a> (Incorrect 
               table!)
%H A037189 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/no3in/
               table.txt">Solutions of the no-three-in-line problem</a>
%Y A037189 Cf. A000769.
%Y A037189 Sequence in context: A023823 A139186 A047840 this_sequence A083342 A016655 
               A057757
%Y A037189 Adjacent sequences: A037186 A037187 A037188 this_sequence A037190 A037191 
               A037192
%K A037189 nonn,nice
%O A037189 1,3
%A A037189 N. J. A. Sloane (njas(AT)research.att.com).
%E A037189 More terms (from Flammenkamp) from N. J. A. Sloane (njas(AT)research.att.com), 
               May 24 2005
%E A037189 Edited by N. J. A. Sloane (njas(AT)research.att.com), Aug 29 2008 at 
               the suggestion of R. J. Mathar