G.f. satisfies A(x) = ( 1 + x*A(x)^3 / (1 - x*A(x)) )^2.
A371582
G.f. satisfies A(x) = ( 1 + x*A(x)^3 / (1 - x*A(x)) )^2.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =146a(4) =1623a(5) =19526a(6) =247516a(7) =3256118a(8) =44037023a(9) =608484766a(10) =8552832116a(11) =121908218724
External references
- oeis: A371582