949520

Appears in sequences

• Equals one maps: number of n X 2 binary arrays indicating the locations of corresponding elements equal to exactly one of their king-move neighbors in a random 0..3 n X 2 array.at n=9A221587
• E.g.f. C(x,y) = cos(y) / sqrt(1 - sin(x)^2 - sin(y)^2).at n=23A324609
• E.g.f. C(y,x) = cos(x) / sqrt(1 - sin(x)^2 - sin(y)^2).at n=25A324611