%I #11 Mar 09 2018 11:35:26
%S 1,2,3,5,7,15,24,49,91,183,356,734,1465,3017,6153,12721,26230,54575,
%T 113480,237296,496612,1042785,2192207,4619736,9747966,20607348
%N Number of 1-sided polypons with n cells.
%C The division of a polypon into triangles is considered significant for this sequence, as for A057784. - _Joseph Myers_, Oct 02 2011
%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/Polypon.html">Polypon</a>
%Y Cf. A057784, A151532, A151533.
%K nonn,hard,more
%O 1,2
%A _Ed Pegg Jr_, May 13 2009
%E a(19)-a(26) from _Joseph Myers_, Oct 02 2011
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