A topological index of a graph G is a numerical parameter related to G which characterizes its topology and is preserved under isomorphism of graphs. In this note, we compute newly defined topological indices, namely, arithmetic-geometric index (AG₁ index), SK index, SK₁ index, and SK₂ index, modified Randić index and sum connectivity index of the line graphs of H-Pantacenic nanotubes.

degree, topological index, line graph, phenylenes, H-Pantacenic nanotube.