184842

Appears in sequences

• Triangle read by rows: T(n,k) is the number of hex trees with n edges and k pairs of adjacent vertices of outdegree 2.at n=29A126188
• The hyper-Wiener index of the ortho-polyphenyl chain with n hexagons (see the Dou et al. and the Deng references).at n=11A216109
• Depth of Pascal's triangle such that the number of elements in the triangle is a factor of the sum of the elements.at n=34A272934