G.f. A(x) satisfies A(x) = (1 + x) * C(x*A(x)^3), where C(x) is the g.f. of A000108.
A381786
G.f. A(x) satisfies A(x) = (1 + x) * C(x*A(x)^3), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =76a(4) =744a(5) =7986a(6) =90836a(7) =1075714a(8) =13122656a(9) =163769229a(10) =2080985186a(11) =26832199993a(12) =350187469872
External references
- oeis: A381786