Eccentric Adjacency Index of Some HexagonalBelts and Chains

The eccentric adjacency index is defined as the summation of the quotients of the sum of adjacent vertex degrees and eccentricity of the concerned vertex of a graph which is a generalization of eccentric connectivity index. In this paper we present explicit expressions for the values of eccentric adjacency indices of some particular hexagonal belts and chainslike linear polyacene and fbonacene.