-10672

Appears in sequences

• 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=9A274220
• Expansion of Product_{n>=1} (1 + 4*x^n)^(1/2).at n=10A303350