G.f. satisfies: A(x) = 1 + x + 3*x*A(x) + x*A(x)^2.
A200031
G.f. satisfies: A(x) = 1 + x + 3*x*A(x) + x*A(x)^2.
Terms
- a(0) =1a(1) =5a(2) =25a(3) =150a(4) =1000a(5) =7125a(6) =53125a(7) =409375a(8) =3234375a(9) =26059375a(10) =213296875a(11) =1768625000a(12) =14825156250a(13) =125419296875
External references
- oeis: A200031