38925119

Appears in sequences

• Numerators of continued fraction convergents to sqrt(77).at n=15A041136
• Numerators of continued fraction convergents to sqrt(693).at n=9A042332
• a(n) = 9*a(n-1)-a(n-2); a(0)=2, a(1)=9.at n=8A056918
• a(n) = 2 * T(n,(n+1)/2) where T(n,x) is a Chebyshev polynomial of the first kind.at n=8A343260