201932

Appears in sequences

• G.f. A(x) satisfies: x = Sum_{n>=1} x^n / ( (1-x)^(n^2) * A(x)^n ).at n=10A301927
• Number of triangles larger than size=1 in a matchstick-made hexagon with side length n.at n=39A307253
• Number of (curved) edges formed when n equally spaced points are placed around a circle and all pairs of points are joined by an interior arc whose radius equals the circle's radius.at n=37A371255