G.f. A(x) satisfies A(x) = (1 + x*A(x)^3) * C(x*A(x)), where C(x) is the g.f. of A000108.
A381783
G.f. A(x) satisfies A(x) = (1 + x*A(x)^3) * C(x*A(x)), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =79a(4) =645a(5) =5682a(6) =52643a(7) =505575a(8) =4987933a(9) =50250625a(10) =514787110a(11) =5346336739a(12) =56161123273a(13) =595667090038
External references
- oeis: A381783