138635

Appears in sequences

• Unlabeled (cyclic) Motzkin numbers: number of ways of drawing any number of nonintersecting chords joining n unlabeled points equally spaced on a circle, up to rotations of the circle.at n=17A175954
• a(n) is the number of squares of side length greater than 1 having vertices at the points of an n X n grid of dots.at n=35A328152