1616350561

Appears in sequences

• E.g.f. 1/(D(x) - S(x)), where C(x)^2 - S(x)^2 = 1 and D(x)^3 - S(x)^3 = 1, and functions S(x), C(x), and D(x) are described by A280620, A280621, and A280622, respectively.at n=13A280624