189720

Appears in sequences

• a(n) = n*(n+1)*(n^2 - 3*n + 6)/4.at n=30A062026
• Number of (w,x,y,z) with all terms in {1,...,n} and w > x < y >= z.at n=31A212501
• a(n) = n*(n+1)*(n+2)*(n+3)*(2*n+1)/12.at n=15A356251