%I #7 May 03 2018 14:55:45
%S 1,3,36,960,35956,1588192,77381016,4031052368,220584971892,
%T 12535415236272,734006917110352,44036846006084336,2695712407044476920,
%U 167837690527630068192,10601944003900014217704,678116169233319969588160,43848248800067454244195956,2862607888444933662236506240
%N Number of noncrossing path sets on 4*n nodes up to rotation with each path having exactly 4 nodes.
%H Andrew Howroyd, <a href="/A303866/b303866.txt">Table of n, a(n) for n = 0..200</a>
%Y Column 4 of A303864.
%Y Cf. A303865, A303867.
%K nonn
%O 0,2
%A _Andrew Howroyd_, May 01 2018