-1116

Appears in sequences

• FP4 polynomials related to the o.g.f.s of the columns of the A156925 matrix.at n=8A156933
• G.f.: x^((k^2+k)/2)/(mul(1-x^i,i=1..k)*mul(1+x^r,r=1..oo)) with k = 4.at n=67A246583
• Expansion of (1 - x)*Sum_{k>=1} k*phi(k)*x^k/(1 - x^k), where phi() is the Euler totient function (A000010).at n=53A292302
• Expansion of Product_{k>0} (1 + x^k/(1 + x^k/(1 + x^k))).at n=12A327684
• a(n) = n^3 * Sum_{d|n} (-1)^(n/d + 1) * mu(d) / d^3.at n=9A338548