207255

Appears in sequences

• Number of rooted binary leaf-multilabeled trees with n leaves on the label set [3].at n=8A220820
• Triangle read by rows: T(n,k) is the number of binary rooted trees with n leaves of exactly k colors and all non-leaf nodes having out-degree 2.at n=38A319541
• Number of partitions of [2n] into pairs whose sums or differences are primes.at n=9A342139