836353

Appears in sequences

• Number of deranged matchings of 2n people with partners (of either sex) such that at least one person is matched with their spouse.at n=8A370253
• Number A(n,k) of partitions of [k*n] into n sets of size k having at least one set of consecutive numbers whose maximum (if k>0) is a multiple of k; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=63A370363