G.f. A(x) satisfies: A(x) = P(x*A(x)) where P(x) = A(x/P(x)) is the g.f. of the partition numbers A000041.

A109085

G.f. A(x) satisfies: A(x) = P(x*A(x)) where P(x) = A(x/P(x)) is the g.f. of the partition numbers A000041.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =10a(4) =38a(5) =153a(6) =646a(7) =2816a(8) =12585a(9) =57343a(10) =265401a(11) =1244256a(12) =5896512a(13) =28200365a(14) =135935424a(15) =659754072a(16) =3221354296a(17) =15812501100a(18) =77985955410a(19) =386254209762

External references