75025

Appears in sequences

• a(n) = 3*a(n-1) - a(n-2) for n >= 2, with a(0) = a(1) = 1.at n=13A001519
• Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x^2 + y^2 + z^2 = 3*x*y*z.at n=29A002559
• a(n) = 3*a(n-2) - a(n-4), a(0)=2, a(1)=1, a(2)=3, a(3)=2. Alternates Lucas (A000032) and Fibonacci (A000045) sequences for even and odd n.at n=25A005247
• Duplicate of A001519.at n=13A011783
• Degree of variety K_{2,n}^4.at n=2A013701
• Odd Fibonacci numbers.at n=16A014437
• Numbers k that divide s(k), where s(1)=1, s(j)=11*s(j-1)+j.at n=14A014858
• a(n) = lcm(n, Fibonacci(n)).at n=24A014965
• Smallest Fibonacci number beginning with n.at n=7A020345
• Pisot sequence E(2,3).at n=22A020695
• Pisot sequences E(3,5), P(3,5).at n=21A020701
• Pisot sequences E(5,8), P(5,8).at n=20A020712
• a(n) = Fibonacci(3*n + 1).at n=8A033887
• a(n) = Fibonacci(4*n + 1).at n=6A033889
• Products of successive Fibonacci numbers.at n=46A034722
• Values of k for which there are no empty intervals when fractional part(m*phi) for m = 1, ..., k is plotted along [ 0, 1 ] subdivided into k equal regions.at n=27A036415
• 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=27A039834
• Fibonacci numbers having initial digit '7'.at n=0A045731
• Smallest positive Fibonacci number divisible by n.at n=24A047930
• Pisot sequences L(2,5), E(2,5).at n=11A048575