1576239

Appears in sequences

• Golden rectangle numbers: F(n) * F(n+1), where F(n) = A000045(n) (Fibonacci numbers).at n=16A001654
• a(n) = a(n-1) + a(n-3) + a(n-4), a(0) = a(1) = a(2) = 1, a(3) = 2.at n=31A006498
• Sum_{i=0..n} (C(n,i) mod 2)*Fibonacci(2i+3) = FL(n+3)Product(L(2^i)^bit(n,i),i=0..).at n=14A050612
• a(n) = F(n)*F(n-1) if n odd otherwise F(n)*F(n-1)-1, where F = Fibonacci numbers A000045.at n=16A059840
• a(n) = a(n-1) + a(n-3) + a(n-4), starting with a(0..3) = 1, 2, 2, 3.at n=30A070550
• a(n) = Sum_{i = 0..floor(n/2)} (-1)^(i + floor(n/2)) F(2*i + e), where F = A000045 (Fibonacci numbers) and e = (1-(-1)^n)/2.at n=32A074677
• Antidiagonal sums of triangle A035317.at n=30A080239
• a(n) = (Lucas(4n+1)-1)/5, or Fibonacci(2n)*Fibonacci(2n+1), or A081017(n)/5.at n=8A081018
• Positive values of k such that there is exactly one permutation p of (1,2,3,...,k) such that i+p(i) is a Fibonacci number for 1<=i<=k.at n=29A097083
• a(2*n) = F(3*n)*F(3*n+2), a(2*n+1) = F(3*n+1)*F(3*n+2), where F = A000045.at n=11A114703
• Ordered Fibonomial coefficients (A144712) which are not Fibonacci numbers (A000045).at n=27A171159
• Denominators a(n) of Pythagorean approximations b(n)/a(n) to 1/2.at n=15A195547
• Numerators b(n) of Pythagorean approximations b(n)/a(n) to 2.at n=4A195615
• Denominators in an expansion of 3 - sqrt(5) as a sum of fractions +-1/d.at n=21A255353
• a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 2, a(1) = 1, a(2) = 0, a(3) = 2.at n=31A295688