A193125 - OEIS

%I #7 Feb 16 2025 08:33:15

%S 0,0,0,2,12,87,815,11086,261042

%N Number of molecular topological index-nonunique connected simple graphs on n nodes.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MolecularTopologicalIndex.html">Molecular Topological Index</a>

%e The paw graph and square graph C_4 both have MTI = 48, while all other 4-node connected simple graphs have unique MTI values, so a(4) = 2.

%K nonn,hard,more,changed

%O 1,4

%A _Eric W. Weisstein_, Jul 16 2011