We found that c 0 equals -4.9 meV/atom, indicating that the incorporation of an additional carbon atom fused by three hexagons (thereby increasing n 0 by 1) into fullerene cage will negligibly decrease E b by 4.9 meV/atom. This result aligns with the fact that the growth of sp 2 carbons in a honeycomb lattice is thermodynamically favorable. We have also noted that the coefficients c 1 , c 2 , and c 3 are positive and proportional to each other, with a correlation of c 1 = 1 2 c 2 = 1 3 c 3 . Additionally, c 1 is approximately 13 orders of magnitude larger than the absolute value of c 0 . Consequently, the linear fitting formula can be adjusted as follows: