G.f. satisfies: A(x) = Sum_{n>=0} A000108(n)^2 * (x-x^2)^n, where A000108(n) = C(2*n,n)/(n+1) is the n-th Catalan number.
A246963
G.f. satisfies: A(x) = Sum_{n>=0} A000108(n)^2 * (x-x^2)^n, where A000108(n) = C(2*n,n)/(n+1) is the n-th Catalan number.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =17a(4) =125a(5) =1055a(6) =9755a(7) =96353a(8) =1000529a(9) =10805045a(10) =120429581a(11) =1377565711a(12) =16103628975a(13) =191753782563
External references
- oeis: A246963