a(n) = a(n-1)^2 - 2, with a(0) = 5.A003487a(n) = a(n-1)^2 - 2, with a(0) = 5.Terms a(0) =5a(1) =23a(2) =527a(3) =277727a(4) =77132286527External referencesoeis: A003487