264893255

Appears in sequences

• a(n) = (tan(1*Pi/11))^(2*n) + (tan(2*Pi/11))^(2*n) + (tan(3*Pi/11))^(2*n) + (tan(4*Pi/11))^(2*n) + (tan(5*Pi/11))^(2*n).at n=5A275546
• a(n) = Sum_{k=0..n} tan(k*Pi/(1+2*n))^(2*n).at n=5A376777