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.
A280624
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.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =20a(5) =81a(6) =452a(7) =2765a(8) =19460a(9) =156121a(10) =1368052a(11) =13327125a(12) =141326500a(13) =1616350561a(14) =20040895252a(15) =264759181085
External references
- oeis: A280624