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%I #8 Jul 07 2015 18:15:49
%S 1,3,7,17,41,101,259,669,1731,4499,11705,30623,80443,211851,558999,
%T 1477983,3914393,10384023,27585099,73366563,195341557,520640553
%N Bridging trails on square lattice.
%H A. J. Guttmann, <a href="http://dx.doi.org/10.1088/0305-4470/18/4/009">Lattice trails II: numerical results</a>, J. Phys. A 22 (1989), 575-588.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Jul 07 2015
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