G.f. satisfies: A(x) = 1/(1 - x - x*{d/dx x^2*A'(x)/A(x)}).
A183607
G.f. satisfies: A(x) = 1/(1 - x - x*{d/dx x^2*A'(x)/A(x)}).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =20a(4) =249a(5) =5087a(6) =155180a(7) =6609730a(8) =374548937a(9) =27237010543
External references
- oeis: A183607