63757904493
domain: N
Appears in sequences
- a(n) = 4*a(n-1) - a(n-2), with a(0) = 0, a(1) = 3.at n=19A005320
- Numerators of continued fraction convergents to sqrt(12).at n=18A041016
- Numerators of the lower principal convergents and the lower intermediate convergents to 3^(1/2).at n=37A143643
- 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=19A356047