Number of polygonal tiles with n sides with two exits per side and n edges connecting pairs of exits, with no edges between exits on the same side and non-isomorphic under rotational and reflectional, i.e. dihedral, symmetry.
A289269
Number of polygonal tiles with n sides with two exits per side and n edges connecting pairs of exits, with no edges between exits on the same side and non-isomorphic under rotational and reflectional, i.e. dihedral, symmetry.
Terms
- a(0) =0a(1) =2a(2) =4a(3) =19a(4) =80a(5) =638a(6) =6054a(7) =76692a(8) =1137284a(9) =19405244a(10) =370597430a(11) =7825459362a(12) =180862277352
External references
- oeis: A289269