a(n) is the number of canonical polygons with n edges having exactly 1 line of reflection symmetry.

A307455

a(n) is the number of canonical polygons with n edges having exactly 1 line of reflection symmetry.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =2a(4) =1a(5) =7a(6) =6a(7) =28a(8) =27a(9) =107a(10) =94a(11) =488a(12) =386a(13) =2066a(14) =1630a(15) =8392a(16) =6780a(17) =34962a(18) =28056a(19) =147356a(20) =117621a(21) =622558a(22) =500525a(23) =2657666a(24) =2149374

External references