E.g.f. C(x) satisfies: C(x)^2 - S(x)^2 = 1 and D(x)^4 - S(x)^4 = 1, where functions S(x) and D(x) are described by A280625 and A280627, respectively.

A280626

E.g.f. C(x) satisfies: C(x)^2 - S(x)^2 = 1 and D(x)^4 - S(x)^4 = 1, where functions S(x) and D(x) are described by A280625 and A280627, respectively.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =109a(4) =3889a(5) =292681a(6) =37275121a(7) =5709311029

External references