G.f.: A(x) = Sum_{n>=0} x^n*((1+x)^n + sqrt(A(x)))^n / (1 + x*sqrt(A(x))*(1+x)^n)^(n+1).
A324963
G.f.: A(x) = Sum_{n>=0} x^n*((1+x)^n + sqrt(A(x)))^n / (1 + x*sqrt(A(x))*(1+x)^n)^(n+1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =61a(7) =223a(8) =1058a(9) =5355a(10) =29477a(11) =171068a(12) =1042319a(13) =6646486a(14) =44231512a(15) =306592233a(16) =2209107328a(17) =16514226787a(18) =127857487521
External references
- oeis: A324963