247448

Appears in sequences

• Number of unlabeled free bicolored trees with n nodes (the colors are not interchangeable).at n=17A122086
• Number of connected categories with n objects and 2n-1 morphisms.at n=17A125702
• Triangle read by rows: T(n,k) is the number of multiset partitions of weight n whose union is a k-set where each part has a different size.at n=63A332253