G.f. A(x) satisfies: A(x) = (x + A(x+x^2))/2 with A(0)=0.
A171792
G.f. A(x) satisfies: A(x) = (x + A(x+x^2))/2 with A(0)=0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =34a(5) =214a(6) =1652a(7) =15121a(8) =160110a(9) =1925442a(10) =25924260a(11) =386354366a(12) =6314171932a(13) =112286067892
External references
- oeis: A171792