-1369

Appears in sequences

• Expansion of (1+x+x^2)*(1-8*x^3-14*x^4+8*x^7+x^8)/(1+x^4)^3.at n=36A188477
• Expansion of (1+x+x^2)*(1-8*x^3-14*x^4+8*x^7+x^8)/(1+x^4)^3.at n=37A188477
• a(n) = (-cos(Pi/7)/cos(2*Pi/7))^n + (-cos(2*Pi/7)/cos(3*Pi/7))^n + (cos(3*Pi/7)/cos(Pi/7))^n.at n=7A274220
• Dirichlet g.f.: 1 / zeta(s-2).at n=36A334657
• a(1) = 1, a(2) = -5; a(n) = -n^2 * Sum_{d|n, d < n} a(d) / d^2.at n=36A359485
• a(1) = 1, a(2) = 3; a(n) = n^2 * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d^2.at n=36A361986
• a(1) = 1; a(n) = n^2 * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d^2.at n=36A361987
• Expansion of [ Sum_{n>=0} 11^(n*(n-1)/2) * (1 + 11^(2*n+1))/12 * x^(n*(n+1)/2) ]^(1/3).at n=2A370334