14878455

Appears in sequences

• Number of restricted hexagonal polyominoes with n cells.at n=13A002212
• Number of polyhexes with n hexagons, having reflectional symmetry (see Harary and Read for precise definition).at n=25A002215
• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-2)*a(2) for n >= 3.at n=13A025238
• Catafusenes (see reference for precise definition).at n=25A044044