16692641

Appears in sequences

• Numerators of continued fraction convergents to sqrt(5).at n=12A001077
• a(n) = 18*a(n-1) - a(n-2).at n=6A023039
• Numerators of continued fraction convergents to sqrt(20).at n=11A041030
• Numerators of continued fraction convergents to sqrt(45).at n=17A041076
• Numerators of continued fraction convergents to sqrt(80).at n=11A041142
• Numerators of continued fraction convergents to sqrt(180).at n=11A041332
• Numerators of continued fraction convergents to sqrt(320).at n=11A041604
• Numerators of continued fraction convergents to sqrt(405).at n=5A041768
• Numerators of continued fraction convergents to sqrt(720).at n=11A042386
• Expansion of x*(1 + x - 2*x^2) / ( 1 - 4*x^2 - x^4).at n=25A059973
• a(1)=1; for n > 2, a(n) is the smallest integer > a(n-1) such that frac(sqrt(5)*a(n)) < frac(sqrt(5)*a(n-1)).at n=22A079497
• a(n) = (F(2*n-1) + F(2*n+1))*(5/6 - cos(2*Pi*n/3)/3), where F(n) = Fibonacci(n).at n=18A128052
• Numerators of continued fraction convergents to sqrt(5/4).at n=11A153316
• a(n) = Lucas(n) - floor(Lucas(n)/2).at n=36A173495
• a(n) = floor(Lucas(n+1)/2), Lucas(n) = A000032(n).at n=35A173714
• Array of ((k^n)+(k^(-n)))/2 where k=(sqrt(x^2+1)+x)^2 for integers x>=1.at n=29A188645
• Size (b^3_n) of unit sphere in a certain graph (see Hazama article for precise definition).at n=34A199935
• Numbers such that floor(a(n)^2 / 5) is a square.at n=25A204520
• Expansion of (1-x+x^3)/(1-x^2+2*x^3-x^4).at n=36A226447
• a(0)=a(1)=1, a(n+2) = a(n+1) + a(n) - A128834(n).at n=36A226956