148158

Appears in sequences

• The number of vertices on a Reuleaux triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=14A340644
• a(0) = 1; a(n) = 5 * Sum_{k=0..n} k * binomial(4*n+k,n-k)/(4*n+k).at n=7A390714