326422

Appears in sequences

• G.f.: 1/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)*(1-x^5))^2.at n=35A117487
• a(n) = [x^n] Product_{k=1..n} 1/(x^(2*k)*(1-x^k)^2).at n=5A258793