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%I #6 Oct 02 2013 16:25:26
%S 1,2,1,3,2,5,4,9,8,16,16,28,30,51,58,96,112,179,216,334,406,624,776,
%T 1178,1472,2216,2796,4163,5260,7833,9964,14755,18756,27762,35400,
%U 52148,66450,98028,125168,184069,234768,345636,441332,647994,826564,1215424
%N Number of 2-sided strip polypons 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/Polypon.html">Polypon</a>
%Y Cf. A057784, A151531, A151532.
%K nonn,hard
%O 1,2
%A _Ed Pegg Jr_, May 13 2009
%E a(21)-a(46) from _Joseph Myers_, Oct 02 2011
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