G.f. satisfies: A(x) = (1 + 3*x*A(x))^2 * (3 + A(x)) / 4.
A231618
G.f. satisfies: A(x) = (1 + 3*x*A(x))^2 * (3 + A(x)) / 4.
Terms
- a(0) =1a(1) =8a(2) =92a(3) =1264a(4) =19220a(5) =311736a(6) =5285868a(7) =92578656a(8) =1661895332a(9) =30416141032a(10) =565437707516
External references
- oeis: A231618