E.g.f. C(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.
A280623
E.g.f. C(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.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =21a(6) =101a(7) =581a(8) =3605a(9) =29141a(10) =239701a(11) =2205861a(12) =22832005a(13) =246573061a(14) =2990463301a(15) =38108222341a(16) =518783617205
External references
- oeis: A280623