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%I #14 Feb 16 2025 08:33:09
%S 1,2,7,25,99,416,1854,8411,38980,182829,867096,4145168,19955321,
%T 96619260,470157772
%N Number of 1-sided polyedges with n edges.
%H Ishino Keiichiro, <a href="https://puzzlewillbeplayed.com/Polyedges/">Polyedge</a>, Puzzle will be played, 2009.
%H Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Polyedge.html">Polyedge</a>
%Y Cf. A019988, A096267, A037245, A151538, A333249.
%K nonn,hard,more
%O 1,2
%A _Ed Pegg Jr_, May 13 2009
%E a(11)-a(14) from _Joseph Myers_, Oct 03 2011
%E a(15) from Ishino Keiichiro's website added by _Andrey Zabolotskiy_, Dec 10 2023