71540

Appears in sequences

• Number of paraffins (see Losanitsch reference for precise definition).at n=26A006010
• The Wiener index of the double-comb graph \/_\/_\/...\/_\/ with 3n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph.at n=34A192025
• The sum of the numbers of the central diamond of the multiplication table [1..k] X [1..k] for k=2*n-1.at n=13A357042