211470

Appears in sequences

• Number of rooted set partitions.at n=10A052889
• Triangle read by rows: T(n,c) = number of successive equalities in set partitions of n.at n=56A056857
• Triangular array read by rows: T(n,k) is the number of blocks of size k in all set partitions of {1,2,...,n}.at n=45A175757
• a(n) = k if the first appearance of n in A077618 is at index k, or 0 if k does not appear in A077618.at n=49A291056