269496

Appears in sequences

• 1/3 the number of nX3 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=5A185553
• 1/3 the number of n X 6 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=2A185556
• T(n,k)=1/3 the number of nXk 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=30A185559
• T(n,k)=1/3 the number of nXk 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=33A185559
• Number of (n+2) X (3+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=20A254902