169000000

Appears in sequences

• Vandermonde sequence using x^2 + y^2 applied to (1,1,2,2,...,floor(n/2)).at n=4A203766
• a(n) is the larger coefficient of the pair (x, y) such that (x^2-y^2)/r, 2*x*y/r, (x^2+y^2)/r are the 2 legs and hypotenuse of the least Pythagorean triple having area A006991(n).at n=29A364108