84064

Appears in sequences

• a(n) = 11 + floor( (1 + Sum_{j=1..n-1} a(j)) / 2).at n=22A120139
• 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=36A192025
• Number of non-sphere-homeomorphic crossing optimal 2-page book drawings of complete graph K_{2n+1}.at n=13A226917
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 374", based on the 5-celled von Neumann neighborhood.at n=8A271458