231417

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w>=average{x,y,z}.at n=26A212089
• a(n) is the number of pairings of the first 2*k positive integers into k pairs (xi, yi) such that the k numbers (xi + yi) mod k are all different where k = 2*n + 1.at n=4A320333