%I #9 Jul 10 2011 18:20:54
%S 0,4,20,56,120,220,364,560,816,1140,1540,2024,2600,3276,4060,4960,5984
%N Duplicate of A002492.
%H <a href="/index/Tu#2wis">Index entries for two-way infinite sequences</a>
%K dead
%O 1,2
