4577611587

Appears in sequences

• a(n) = 4*a(n-1) - a(n-2), with a(0) = 0, a(1) = 3.at n=17A005320
• Numerators of continued fraction convergents to sqrt(12).at n=16A041016
• a(n) = 4*a(n-2) - a(n-4).at n=33A083336
• Expansion of (1-x)*(2*x^2-4*x+1)/(1-2*x+5*x^2-4*x^3+x^4).at n=33A131039
• Numerators of the lower principal convergents and the lower intermediate convergents to 3^(1/2).at n=33A143643
• Numerators of the other-side convergents to sqrt(3).at n=33A259593
• The number of links of a qualifying "snake" polyline that connects the midpoints of opposite sides of the n-th regular integer hexagon that allows such a construction.at n=17A356047