G.f.: A(x) = Sum_{n>=0} x^n * (1 + (-1)^n * sqrt(A(x)))^n / (1 - (-1)^n * x*sqrt(A(x)))^(n+1).
A325156
G.f.: A(x) = Sum_{n>=0} x^n * (1 + (-1)^n * sqrt(A(x)))^n / (1 - (-1)^n * x*sqrt(A(x)))^(n+1).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =73a(5) =305a(6) =1357a(7) =6113a(8) =28241a(9) =132257a(10) =628181a(11) =3015281a(12) =14611481a(13) =71367505a(14) =351026077a(15) =1737069249a(16) =8642422689a(17) =43204965953a(18) =216918504613
External references
- oeis: A325156