123666803

Appears in sequences

• Given the infinite continued fraction i+(i/(i+(i/(i+...)))), where i is the square root of (-1), this is the numerator of the imaginary part of the convergents.at n=26A091808
• Expansion of x/(x^4-x^3-2x^2-x+1).at n=27A092886
• a(n+1) is the Hankel transform of C(n)+C(n+2), where C(n) = A000108(n).at n=13A138269