79143

Appears in sequences

• Number of ordered bicoverings of an unlabeled n-set.at n=6A060090
• Records in A065925.at n=35A065927
• Array read by antidiagonals: A(n,k) is the number of binary matrices with k columns and any number of distinct nonzero rows with n ones in every column and columns in nonincreasing lexicographic order.at n=38A331571