1287889

Appears in sequences

• G.f.: Sum_{k>=1} x^k/(1+x^k) * Product_{k>=1} (1+x^k)/(1-x^k).at n=36A305101
• a(n) = n^4 + 28*n^3 + 252*n^2 + 784*n + 448.at n=27A346514