a(n) = [x^n] ((Sum_{k=0..n} (k+1)!*x^k)/(Sum_{k=0..n} (k+1)!*(-x)^k))^(1/2).
A303567
a(n) = [x^n] ((Sum_{k=0..n} (k+1)!*x^k)/(Sum_{k=0..n} (k+1)!*(-x)^k))^(1/2).
Terms
- a(0) =1a(1) =2a(2) =2a(3) =16a(4) =30a(5) =492a(6) =1052a(7) =29632a(8) =64582a(9) =2842220a(10) =6118860a(11) =393285408a(12) =831896748a(13) =74023348728a(14) =154261364376
External references
- oeis: A303567