-47525

Appears in sequences

• Expansion of g.f. (1-x)(x^2-5x+3)/(x^4-6x^3+13x^2-6x+1).at n=9A105660
• a(n) = cos(2*n*arcsin(sqrt(3))) = (-1)^n*cosh(2*n*arcsinh(sqrt(2))).at n=5A146311