988416

Appears in sequences

• a(n) = n^2*(n+1)*binomial(2*n-2, n-1)/2.at n=8A037972
• Szeged index of the grid graph P_n X P_n.at n=11A245828
• a(n) = H(n-1, n, n+1) where H(a, b, c) = (a + b + c)*(a + b - c)*(b + c - a)*(c + a - b) is Heron's polynomial.at n=24A339488