507544127

Appears in sequences

• Golden rectangle numbers: F(n) * F(n+1), where F(n) = A000045(n) (Fibonacci numbers).at n=22A001654
• a(n) = F(n)*F(n-1) if n odd otherwise F(n)*F(n-1)-1, where F = Fibonacci numbers A000045.at n=22A059840
• a(n) = (Lucas(4n+1)-1)/5, or Fibonacci(2n)*Fibonacci(2n+1), or A081017(n)/5.at n=11A081018
• Three consecutive elements of the sequence built from a quadratic form over four consecutive Fibonacci numbers A000045.at n=15A114695
• 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=15A114703
• Denominators a(n) of Pythagorean approximations b(n)/a(n) to 1/2.at n=21A195547
• Numerators b(n) of Pythagorean approximations b(n)/a(n) to 2.at n=6A195615
• Denominators in an expansion of 3 - sqrt(5) as a sum of fractions +-1/d.at n=30A255353