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%I #6 Mar 31 2012 10:32:24
%S 0,1,2,5,12,31,81,239
%N Meandric numbers for an undirected line crossing two perpendicular roads at n points, beginning in the (-,-) quadrant, crossing x axis first and ending in any quadrant.
%Y Similar to A077551 but line is undirected.
%K nonn,more
%O 0,3
%A _N. J. A. Sloane_ and _Jon Wild_, Aug 25 2003
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