1316136

Appears in sequences

• a(n) = (n-1)*n*(n+1)*(n+2)*(2*n+1)/40.at n=30A112851
• Number of (2+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=16A253699