G.f. satisfies: A(x) = 1 + x*A(x) * A(A(x) - 1).
A182224
G.f. satisfies: A(x) = 1 + x*A(x) * A(A(x) - 1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =35a(5) =220a(6) =1622a(7) =13480a(8) =123212a(9) =1218694a(10) =12898292a(11) =144890911a(12) =1717072304a(13) =21367220392a(14) =278174617499
External references
- oeis: A182224