Generalized Catalan numbers 5*x*A(x)^2 -A(x) +1 -4*x=0.

A068767

Generalized Catalan numbers 5*x*A(x)^2 -A(x) +1 -4*x=0.

Terms

    a(0) =1a(1) =1a(2) =10a(3) =105a(4) =1150a(5) =13050a(6) =152500a(7) =1825625a(8) =22293750a(9) =276758750a(10) =3483287500a(11) =44352006250a(12) =570333187500

External references