-22750

Appears in sequences

• Expansion of Product_{i>=1, j>=1, k>=1, l>=1} (1 - x^(i*j*k*l))/(1 + x^(i*j*k*l)).at n=28A321302
• a(n) = Sum_{k=1..n} (-1)^k*k^3*floor(n/k).at n=36A366917