28514435

Appears in sequences

• Fibonacci sequence beginning 0, 5.at n=34A022088
• Layer counting sequence for hyperbolic tessellation by regular pentagons of angle Pi/2.at n=17A054888
• Recamán's Fibonacci variation : a(1)=a(2)=1 then a(n) = a(n-1)+a(n-2)-F(n) if that number is >0 and not already in the sequence; a(n) = a(n-1)+a(n-2)+F(n) otherwise where F(n) denotes the n-th Fibonacci number.at n=37A091484
• y-values in the solution to 5*x^2 - 20 = y^2.at n=17A201157
• a(n) = 3*a(n-2) - a(n-4), a(0)=0, a(1)=1, a(2)=5, a(3)=4.at n=34A203976