G.f. satisfies A(x) = ( 1 + x*A(x)^2 / (1 - x*A(x))^2 )^2.
A365148
G.f. satisfies A(x) = ( 1 + x*A(x)^2 / (1 - x*A(x))^2 )^2.
Terms
- a(0) =1a(1) =2a(2) =13a(3) =102a(4) =898a(5) =8484a(6) =84061a(7) =861918a(8) =9068950a(9) =97366812a(10) =1062425010a(11) =11747773372a(12) =131350499044
External references
- oeis: A365148