6221993

Appears in sequences

• Number of zero-sum n X n -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=4A202040
• Number of zero-sum nX5 -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=4A202044
• T(n,k)=Number of zero-sum nXk -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=40A202047