%I
%S 1,1,2,6,15,44,121,353,1005,2919,8398,24310,70064,202225,582365,
%T 1676889,4821924,13857720,39787804
%N Number of 1sided strip polyhexes 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/Polyhex.html">Polyhex</a>
%K nonn,hard,more
%O 1,3
%A _Ed Pegg Jr_, May 13 2009
%E a(13)a(19) from _Joseph Myers_, Nov 26 2010
