508921

Appears in sequences

• E.g.f. sqrt(D(x)^2 + S(x)^2), such that: C(x)^2 - S(x)^2 = 1 and D(x)^4 - S(x)^4 = 1, where functions S(x), C(x), and D(x) are described by A280625, A280626, and A280627, respectively.at n=5A280629
• G.f. satisfies A(x) = 1 + x^3*A(x)^5*(1 + x*A(x)).at n=20A365726