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%I #22 Jun 07 2022 15:20:30
%S 1,4,6,22,56,198,624,2182,7448,26319,92826,332181,1192845,4315845,
%T 15678200,57227380,209623109,770516966,2840466846,10499678185,
%U 38905008340,144475534207
%N Number of 1-sided polytans (polyaboloes) 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/Polytan.html">Polytan</a>
%Y Cf. A006074.
%K nonn,hard,more
%O 1,2
%A _Ed Pegg Jr_, May 13 2009
%E a(13)-a(14) from _George Sicherman_, Sep 27 2012
%E a(15) from _George Sicherman_, Aug 06 2013
%E a(15) corrected and a(16)-a(20) from _John Mason_, Jan 07 2022
%E a(21)-a(22) from _Aaron N. Siegel_, Jun 07 2022
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