Given g.f. A(x), let B(x) = 1 + x*A(x)^2 and C(x) = 1 + x*A(x)^3, then B(x*C(x)) = C(x) and C(x/B(x)) = B(x).
A249791
Given g.f. A(x), let B(x) = 1 + x*A(x)^2 and C(x) = 1 + x*A(x)^3, then B(x*C(x)) = C(x) and C(x/B(x)) = B(x).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =44a(4) =530a(5) =7911a(6) =139129a(7) =2798844a(8) =63178500a(9) =1578855377a(10) =43245568061
External references
- oeis: A249791