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%I #5 Mar 30 2012 17:28:44
%S 6,9,14,24,42,77,144,276,538,1065,2136,4321,8790,17967,36890,76050,
%T 157380,326824,680880,1422570,2979572,6254175,13153242,27712901,
%U 58487796,123632910
%N Number of fixed polypons with n cells (division into triangles is significant).
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Polypon.html">Polypon</a>
%Y Cf. A057784, A151531, A151532, A151533.
%K nonn,hard
%O 1,1
%A _Joseph Myers_, Oct 08 2011
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