874998

Appears in sequences

• Number of n X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.at n=8A032260
• Number of (n+2) X 9 binary arrays avoiding patterns 001 and 110 in rows and columns.at n=6A202051
• Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [4], with each label used at least once.at n=9A220831