G.f. satisfies A(x) = ( 1 + x*A(x)^3 * (1 + x*A(x)) )^2.
A371575
G.f. satisfies A(x) = ( 1 + x*A(x)^3 * (1 + x*A(x)) )^2.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =144a(4) =1587a(5) =18942a(6) =238301a(7) =3111788a(8) =41779164a(9) =573127760a(10) =7998164674a(11) =113189243386
External references
- oeis: A371575