-17711
domain: Z
Appears in sequences
- a(n+2) = -a(n+1) + a(n) (signed Fibonacci numbers) with a(-2) = a(-1) = 1; or Fibonacci numbers (A000045) extended to negative indices.at n=24A039834
- a(n) = (-1)^(n-1)*(a(n-1) - a(n-2)), a(1)=1, a(2)=1.at n=46A051792
- a(n) = (-1)^(n-1)*(a(n-1) - a(n-2)), a(1)=1, a(2)=1.at n=49A051792
- Expansion of (-3*x^3-18*x^2+14*x-1)/(3*x^4-5*x^2+4*x-1).at n=24A103135
- A characteristic triangle for the Fibonacci numbers.at n=76A110033
- First differences of A135992.at n=22A135994
- a(n) = a(n-1)+a(n-2), n>1 ; a(0)=1, a(1)=-1.at n=24A152163
- a(n)=Product_{k=1..floor((n-1)/2)} (1 + 4*cos(k*Pi/n)^2)*(1 - 4*sin(k*Pi/n)^2).at n=22A152191
- Hankel transform of A157143.at n=29A157144
- Hankel transform of A157143.at n=30A157144
- a(n+4) = a(n+3) - 2*a(n+2) - a(n+1) - a(n), starting with (0, 1, 0, -2).at n=22A173344
- a(n) = (-1)^floor( (n-1) / 3 ) * F(n), where F = Fibonacci.at n=22A236191
- a(n) = Fibonacci(n) * A128834(n).at n=22A306637
- a(n) = F(n) * (-1)^(n*(n-1)/2) where F(n) = A000045(n) Fibonacci numbers.at n=22A333378