1898630

Appears in sequences

• Number of graphs with loops, having unlabeled (non-isolated) nodes and n labeled edges.at n=7A014501
• Array read by antidiagonals: A(n,k) is the number of nonnegative integer matrices with k distinct columns and any number of nonzero rows with column sums n and rows in nonincreasing lexicographic order.at n=47A331161