256452714

Appears in sequences

• a(n) = (A126086(n) - 3*A001850(n) + 2)/6.at n=5A137219
• Array read by antidiagonals: A(n,k) is the number of binary matrices with k distinct columns and any number of nonzero rows with n ones in every column and columns in decreasing lexicographic order.at n=51A331277