153027601

Appears in sequences

• a(n) = 5*a(n-1) - a(n-2) for n > 1, a(0) = 0, a(1) = 1.at n=13A004254
• Denominators of continued fraction convergents to sqrt(21).at n=25A041033
• Denominators in continued fraction [0; 1, 3, 1, 3, 1, 3, ...].at n=24A136211
• Bisection of Chebyshev {S(n, 5)}_{n>=0}; the even part.at n=6A362357