THERMAL SCIENCE, cilt.26, 2022 (SCI-Expanded)
In this study, we compute Merrifield-Simmons index of graphs which corresponds to P-L (2, n) by using the decomposition formula. Examination shows that Merrifield-Simmons index of certain classes of graphs deduce as a result in a difference equation. Further, the prominent formula for Merrifield-Simmons index of P-L (2, n) and generating function are found as a function of the number n of hexagons in the state of P-L (2, n). Also the relations formed for the (P-L (2, n, n)) graphs obtained by combining two P-L (2, n) with a certain angle between them are given.