76156

Appears in sequences

• Number of n X n matrices over {0,1} with rows and columns summing to 3, rows and columns sorted (>=) by value.at n=9A181344
• T(n,k) = Number of (n+k-1) X (n+k-1) binary arrays with k 1s in every row and column with rows and columns in lexicographically nondecreasing order.at n=48A227061