G.f. satisfies: A(x) = x + 3*x*A(x) + 6*x*A(x)*A(A(x)) + 10*x*A(x)*A(A(x))*A(A(A(x))) +...
A153305
G.f. satisfies: A(x) = x + 3*x*A(x) + 6*x*A(x)*A(A(x)) + 10*x*A(x)*A(A(x))*A(A(A(x))) +...
Terms
- a(0) =1a(1) =3a(2) =15a(3) =109a(4) =1008a(5) =10983a(6) =135097a(7) =1828425a(8) =26777775a(9) =419530384a(10) =6973851684a(11) =122248585620
External references
- oeis: A153305