218718

Appears in sequences

• Triangle T(n,r) read by rows: order of the semigroup of orientation-preserving partial transformations of n elements with breath r.at n=54A289710
• The order of the semigroup of orientation-preserving full transformations on n elements.at n=8A289715
• Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than ten.at n=14A292216