74184

Appears in sequences

• a(n) is the number of polygons whose vertices are the (2*n+1)-th roots of unity and whose 2*n+1 sides all have distinct slopes.at n=5A309318
• The number of regions inside a 2 by 1 ellipse formed by the straight line segments mutually connecting all points formed by dividing the ellipse into 2n equal angle sectors from its origin.at n=18A341688
• Number of partitions of n such that 3*(least part) <= greatest part.at n=43A363211