2785906

Appears in sequences

• Number of phylogenetic rooted trees with n labels.at n=7A005804
• Triangle read by rows: T(n,k) is the number of series-reduced rooted trees whose leaves are multisets of colors with a total of n elements using exactly k colors.at n=35A330762
• Triangle read by rows: T(n,k) is the number of series-reduced rooted trees whose leaves are sets of colors with a total of n elements using exactly k colors.at n=35A330763