19137

Appears in sequences

• Number of bipartite partitions.at n=17A002768
• Number of noncrossing nonplanted bushes with n nodes, i.e., rooted noncrossing trees with n nodes and no nodes of degree 1.at n=9A030982
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 92.at n=32A031590
• Becomes prime after exactly 8 iterations of f(x) = sum of prime factors of x.at n=2A047827
• Becomes prime or 4 after exactly 9 iterations of f(x) = sum of prime factors of x.at n=12A048131
• Number of different groupings among the hierarchical orderings of n unlabeled elements.at n=9A104500
• Stable k-tree numbers.at n=9A224917
• Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 2.at n=9A242522
• Number of unlabeled 7-trees on n nodes.at n=15A322754
• Lexicographically earliest sequence of distinct positive integers such that the concatenation of any four successive digits forms a prime.at n=48A334050
• Consecutive internal states of the linear congruential pseudo-random number generator (321*s + 123) mod 10^5 when started at 1.at n=32A383128