159664

Appears in sequences

• G.f.: Sum_{k>=1} x^(2*k)/(1+x^(2*k)) * Product_{k>=1} (1+x^k)/(1-x^k).at n=31A305122
• Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + j*x^(k*j))).at n=26A318290