542881

Appears in sequences

• a(n) = 648*n^2 - 72*n + 1.at n=28A154514
• a(n) = 10368*n^2 - 15840*n + 6049.at n=7A157264
• Sum of the legs of the unique primitive Pythagorean triple (a,b,c) such that (a-b+c)/2 = A000032(n) and its long leg and hypotenuse are consecutive natural numbers.at n=13A383039