787710

Appears in sequences

• Numbers k such that sigma_2(k)*sigma_1(k)/sigma_0(k) is a perfect square.at n=30A152218
• a(n) = 6*a(n-1) - 7*a(n-2) - 2*a(n-3) for n >= 3, with a(0) = a(1) = 0, a(2) = 1.at n=11A345031