9886633715

Appears in sequences

• a(n) = 5*7^n.at n=11A193577
• Expansion of g.f. (1-2*x)/(1-7*x).at n=12A196661
• a(n) = (2*sqrt(7)*sin(Pi/7))^n + (-2*sqrt(7)*sin(2*Pi/7))^n + (-2*sqrt(7)*sin(4*Pi/7))^n.at n=14A275830