1694157

Appears in sequences

• a(n) = 4*a(n-1) - a(n-2), with a(0) = 0, a(1) = 3.at n=11A005320
• Numerators of continued fraction convergents to sqrt(12).at n=10A041016
• a(n) = 4*a(n-2) - a(n-4).at n=21A083336
• Numerators of principal and intermediate convergents to 3^(1/2).at n=32A143642
• Numerators of the lower principal convergents and the lower intermediate convergents to 3^(1/2).at n=21A143643
• List of triples (r,s,t): the matrix M = [[4,12,9][2,7,6][1,4,4]] is raised to successive powers, then (r,s,t) are the square roots of M[3,1], M[1,1], M[1,3] respectively.at n=35A249578
• Numerators of the other-side convergents to sqrt(3).at n=21A259593
• 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=11A356047