89520

Appears in sequences

• Number of n X n 0..3 matrices with all row and column sums equal.at n=4A067211
• Expansion of x/(sqrt(1-4*x^2) + x - 1).at n=13A100087
• Number of nX4 0..3 arrays with row sums equal and column sums equal.at n=3A202682
• T(n,k)=Number of nXk 0..3 arrays with row sums equal and column sums equal.at n=24A202686
• T(n,k) is the number of n X n 0..k arrays with row and column sums equal.at n=32A202784
• Number of 4 X 4 0..n arrays with row and column sums equal.at n=3A202786
• Number of n-digit binary strings such that for all 2 <= k <= n, the string formed by the first k digits of the original string is composed of at least one-quarter 1's and one-quarter 0's.at n=18A268691
• Records in A348409.at n=15A348254
• a(n) is the greatest k such that A307730(k) = n.at n=40A348409