-922077

Appears in sequences

• a(n) = 5^n*cos(2*n*arctan(1/2)) or denominator of tan(2*n*arctan(1/2)).at n=9A066771
• Numerator of imaginary part of (3*i - 1)^(-n).at n=18A124871
• Real part of (2 + i)^n, where i = sqrt(-1).at n=18A139011
• Imaginary part of (4 + 3i)^n.at n=8A139031