33553757

Appears in sequences

• a(n) = 2^n - n*(n+2).at n=25A176778
• Equals one maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..3 nX5 array.at n=4A220750
• T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..3 nXk array.at n=40A220751