G.f. satisfies: A(x) = C(2x)*A(x^3*C(2x)^4), where C(x) is the g.f. of the Catalan numbers (A000108).
A120916
G.f. satisfies: A(x) = C(2x)*A(x^3*C(2x)^4), where C(x) is the g.f. of the Catalan numbers (A000108).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =42a(4) =244a(5) =1504a(6) =9656a(7) =63856a(8) =431872a(9) =2972778a(10) =20756036a(11) =146627648a(12) =1046060836a(13) =7525452296a(14) =54530660832a(15) =397628393728
External references
- oeis: A120916