191025

Appears in sequences

• a(n) = n^2*(n+1)^2*(4*n^2 - 5*n + 4)/12.at n=9A101381
• Number of nX4 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=4A283278
• Number of nX5 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=3A283279
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=31A283282
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.at n=32A283282
• Coefficients of Hilbert class polynomial H_D(x) as D runs through the numbers -3, -4, -7, -8, -11, -12, ... .at n=13A305474
• a(n) = Sum_{k=0..n} binomial(n+k-1,n) * binomial(n+k,n)^2.at n=4A374676