191678

Appears in sequences

• Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A316870
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A316873
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=40A316876
• a(n) = Sum_{k=1..n} binomial(n,k) * sigma_2(k).at n=11A356038