31843

Appears in sequences

• Numbers k such that 131*2^k+1 is prime.at n=30A032415
• Number of zero-sum -n..n arrays of 4 elements with first and second differences also in -n..n.at n=30A201875
• Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A306130
• Number of nX5 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A306133
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.at n=40A306136