4794633

Appears in sequences

• Number of endofunctions on [n] such that no element has a preimage of cardinality one.at n=9A231797
• Number A(n,k) of endofunctions on [n] such that no element has a preimage of cardinality k; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=64A245405