-2620

Appears in sequences

• Product_{k>=1} 1/(1 - x^k)^a(k) = 1 + 5x.at n=5A038066
• Sum of the n-th antidiagonal in the triangle A192011.at n=44A198862
• Expansion of Sum_{k>0} x^(2*k)/(1+x^k)^4.at n=24A363598
• Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = -(1/n) * Sum_{d|n} mu(n/d) * (-k)^d.at n=50A383011