118658

Appears in sequences

• Divide even numbers into groups with prime(n) elements and add together.at n=21A034959
• a(n) = [x^(2n)y^n] Product_{i>=1} 1/((1-x^(2i-1)y^i)(1-x^(2i-1)y^(i-1))(1-x^(2i)y^i)^2).at n=15A316587