170608

Appears in sequences

• a(n) = A027170(2n-1, n-2).at n=7A027176
• Number of nX4 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=7A317892
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=58A317896