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.
A039834
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.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =-1a(5) =2a(6) =-3a(7) =5a(8) =-8a(9) =13a(10) =-21a(11) =34a(12) =-55a(13) =89a(14) =-144a(15) =233a(16) =-377a(17) =610a(18) =-987a(19) =1597a(20) =-2584a(21) =4181a(22) =-6765a(23) =10946a(24) =-17711a(25) =28657a(26) =-46368a(27) =75025a(28) =-121393a(29) =196418
External references
- oeis: A039834