Number of free hexagonal polygons of symmetry class C_(2h) and area n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =7a(6) =7a(7) =35a(8) =36a(9) =169a(10) =177a(11) =807a(12) =859a(13) =3864a(14) =4145a(15) =18616a(16) =20098a(17) =90265a(18) =97913a(19) =440230a(20) =479367a(21) =2157946a(22) =2357108a(23) =10623852a(24) =11634624a(25) =52496803a(26) =57618226a(27) =260236031a(28) =286164543a(29) =1293603599