107616

Appears in sequences

• a(0) = 1, a(1) = 2, a(n) = 4*a(n-1) - 2*a(n-2), n >= 2.at n=10A006012
• Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1/2 - 2*x^2 + x^4).at n=19A030435
• Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1 - 4*x^2 + 2*x^4).at n=20A030436
• a(0)=0; a(1)=1; a(n) = a(n-1) + (3 + (-1)^n)*a(n-2)/2.at n=21A062112
• Coefficient of x^2 in (1+x)^n mod 1+x^4.at n=20A099588
• Solutions x to the negative Pell equation y^2 = 72*x^2 - 73728 with x,y >= 0.at n=5A281237