24728

Appears in sequences

• Number of regions formed inside square by diagonals and the segments joining the vertices to the points dividing the sides into n equal length segments.at n=37A108914
• Number of line segments connecting exactly 9 points in an n x n grid of points.at n=46A177725
• a(n) is the index of the first occurrence of the Euclidean distance prime(n) from a point on a square spiral to its starting point at 1.at n=21A336335
• G.f. A(x) satisfies A(x) = 1 + x*A(x) / (1 - x*A(x)^2)^3.at n=7A367239