2154304

Appears in sequences

• Expansion of E.g.f.: 1/(cosh(x)*cos(x)) (only powers that are multiples of 4).at n=3A009013
• G.f. A(x) satisfies: A(x) = 1/(1 + x*A(x)/(1 + x^2*A(x)/(1 + x^3*A(x)/(1 + x^4*A(x)/(1 + ...))))), a continued fraction.at n=16A301362