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Number of 1-sided strip polycairos with n cells.
4

%I #9 Oct 02 2013 16:25:26

%S 1,3,7,19,47,125,310,803,2020,5144,12986,32829,82728,208461,524092,

%T 1317284,3305350,8291010,20770830

%N Number of 1-sided strip polycairos 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/Polycairo.html">Polycairo</a>

%Y Cf. A159866, A151534, A151536.

%K nonn,hard,more

%O 1,2

%A _Ed Pegg Jr_, May 13 2009

%E a(13)-a(19) from _Joseph Myers_, Oct 03 2011