%I #12 Apr 22 2019 11:46:32
%S 2,1,2,6,10,17,34,72,142,288,585,1195,2413,4898
%N a(n) is the number of canonical polygons with 4n edges having exactly 4 lines of reflection symmetry.
%H Lars Blomberg, <a href="/A307519/a307519.pdf">Examples of canonical polygons with exactly 4 lines of reflection symmetry</a>
%Y Cf. A052436, A307387, A307391, A307426, A307454, A307455, A307456, A307519.
%K nonn,more
%O 1,1
%A _Lars Blomberg_, Apr 12 2019