10891545

Appears in sequences

• Fibonacci sequence beginning 0, 5.at n=32A022088
• Layer counting sequence for hyperbolic tessellation by regular pentagons of angle Pi/2.at n=16A054888
• y-values in the solution to 5*x^2 - 20 = y^2.at n=16A201157
• a(n) = 3*a(n-2) - a(n-4), a(0)=0, a(1)=1, a(2)=5, a(3)=4.at n=32A203976