416020

Appears in sequences

• Denominators of continued fraction convergents to sqrt(5).at n=10A001076
• a(n) = floor(Fibonacci(n)/2).at n=30A004695
• a(n) = Sum_{k=0..floor(n/4)} binomial(n-2k,2k).at n=29A005252
• a(n) = 10th Fibonacci polynomial evaluated at 2^n.at n=2A020536
• a(n) = C(n-1,1) + C(n-3,3) + ... + C(n-2*m-1,2*m+1), where m = floor((n-2)/4).at n=27A024490
• Integers that appear as ratios of Fibonacci numbers F(kn)/F(k), but omitting Fibonacci numbers F(n)/F(1) and Lucas numbers F(2n)/F(n).at n=28A031122
• Expansion of x*(1 + x - 2*x^2) / ( 1 - 4*x^2 - x^4).at n=20A059973
• a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).at n=5A060645
• Nonprimes which are the average of two consecutive Fibonacci numbers.at n=8A071683
• Ratio-determined insertion sequence I(0.264) (see the link below).at n=9A085348
• Expansion of (1+x)/((1+x+x^2)(1-x-x^2)).at n=28A093040
• A Fibonacci convolution.at n=29A094686
• Expansion of (-1+2x+2x^2)/((1+x+x^2)(1-x-x^2)).at n=29A100887
• Expansion of (1 + x)^2/((1 + x + x^2)*(1 + 3*x + x^2)).at n=14A113066
• Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.at n=14A113067
• Negative of the Hankel transform of C(n) - C(n+2), where C = A000108.at n=13A138268
• Largest proper divisor of the Fibonacci numbers > 1.at n=27A139045
• Numerator of x(n), where x(n) = x(n-1) + x(n-2) with x(0)=0, x(1)=1/2.at n=30A167808
• a(n) = ceiling(Fibonacci(n)/2).at n=30A173173
• a(n) = (A000045(n)+A173432(n))/2.at n=29A173433