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In straight chaining (second case) the graph consisting of 5-cycles in two rows with ‘b’ cycles in row 1 and ‘a’ cycles in row 2 denoted by G(a,b,S2) is as shown below. Abstract: The major task of QSAR research is to transfer the chemical formula of a molecular graph into numerical format. Topological index is an effective tool to do this. Pentachains in two rows include chemical graph of Dodecahydropentaleno[1,6-cd]pentalene. In this paper, the explicit formulae for hyper wiener index of pentachains in two rows of different lengths are established.

Hyper Wiener Index of Concatenated Pentagons in Two Rows