177940

Appears in sequences

• For n weights, number of combinations when limited to two weights per pan.at n=35A037255
• Numbers k such that phi(k) and sigma(k) are both perfect squares.at n=36A067781
• a(n) = [(x*y)^n] Product_{k>=1} 1 / (1 - x^k - y^k)^k.at n=8A382947