326650

Appears in sequences

• Number of n X n binary matrices with floor(n^2/2) 1's and rows and columns in lexicographically nondecreasing order.at n=5A180978
• T(n,k)=number of nXk binary matrices with floor((n*k)/2) 1's and rows and columns in lexicographically nondecreasing order.at n=60A180979
• Number of n X n 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.at n=5A201378
• Number of nX6 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.at n=5A201382
• T(n,k)=Number of nXk 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.at n=60A201384
• Irregular triangle read by rows: T(n,i) = number of n X n semi-canonical binary matrices with exactly i 1's, where 0 <= i <= n^2.at n=78A268523