On median nature and enumerative properties of Fibonacci-like cubes

Fibonacci cubes, extended Fibonacci cubes, and Lucas cubes are induced subgraphs of hypercubes defined in terms of Fibonacci strings. It is shown that all these graphs aremedian. Several enumeration results on the number of their edges and squares are obtained. Some identities involving Fibonacci and Lucas numbers are also presented. © 2005 Elsevier B.V. All rights reserved.