G.f. A(x) satisfies: A(x) = 1 + x * A(x/(1 - x)) / (1 - x^2).
A346771
G.f. A(x) satisfies: A(x) = 1 + x * A(x/(1 - x)) / (1 - x^2).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =23a(6) =81a(7) =325a(8) =1429a(9) =6851a(10) =35443a(11) =196507a(12) =1160633a(13) =7266561a(14) =48022313a(15) =333776331a(16) =2432140759a(17) =18528143535a(18) =147201596073
External references
- oeis: A346771