O.g.f. A(x) satisfies: A(x) = x * (1 + 3*x*A'(x)) / (1 + x*A'(x)).
A301385
O.g.f. A(x) satisfies: A(x) = x * (1 + 3*x*A'(x)) / (1 + x*A'(x)).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =94a(5) =474a(6) =2974a(7) =24630a(8) =271710a(9) =3799570a(10) =63378806a(11) =1208997078a(12) =25736584670a(13) =602485683530
External references
- oeis: A301385