G.f.: A(x) = F(x*F(x)^3) = F(F(x)-1) where F(x) = 1 + x*F(x)^3 is the g.f. of A001764.

A153293

G.f.: A(x) = F(x*F(x)^3) = F(F(x)-1) where F(x) = 1 + x*F(x)^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =42a(4) =317a(5) =2508a(6) =20517a(7) =172180a(8) =1474689a(9) =12843768a(10) =113444721a(11) =1014062898a(12) =9158151426a(13) =83449247979a(14) =766340138037

External references