%I
%S 1,3,14,54,239,1007,4375,18728,80572,344651,1473402,6280556,26732173
%N Number of 1sided triangular strip polyedges with n cells.
%H Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Polyedge.html">Polyedge</a>
%Y Cf. A151539, A151541, A159867.
%K nonn,hard,more
%O 1,2
%A _Ed Pegg Jr_, May 13 2009
%E a(9)a(13) from _Joseph Myers_, Oct 05 2011
