A307456 - OEIS

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A307456

a(n) is the number of canonical polygons with 2n edges having exactly 2 lines of reflection symmetry.

%I #12 Apr 22 2019 11:46:36

%S 2,2,1,4,11,24,47,99,211,437,909,1925

%N a(n) is the number of canonical polygons with 2n edges having exactly 2 lines of reflection symmetry.

%H Lars Blomberg, <a href="/A307456/a307456.pdf">Examples of canonical polygons with exactly 2 lines of reflection symmetry</a>

%Y Cf. A052436, A307387, A307391, A307426, A307454, A307455, A307456, A307519.

%K nonn,more

%O 2,1

%A _Lars Blomberg_, Apr 09 2019