52161

Appears in sequences

• Number of crossings in a regular drawing of the complete bipartite graph K(n,n).at n=25A159065
• Sum over all Dyck paths of semilength n of products over all peaks p of y_p^2, where y_p is the y-coordinate of peak p.at n=6A258179
• Starts of runs of at least 3 consecutive odd numbers whose prime factors are all prime-indexed primes.at n=28A357168
• G.f. satisfies A(x) = 1 + x*A(x)^3 + x^3*A(x)^3.at n=8A367059
• Array read by antidiagonals: Place k points in general position on each side of a regular n-gon and join every pair of the k*n boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of edges in the resulting planar graph.at n=39A392282