E.g.f.: exp( Sum_{n>=1} x^(2*n)/(2*A000108(n)) ) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!, where A000108 is the Catalan numbers.
A193443
E.g.f.: exp( Sum_{n>=1} x^(2*n)/(2*A000108(n)) ) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!, where A000108 is the Catalan numbers.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =177a(4) =6081a(5) =320625a(6) =23901993a(7) =2382903873a(8) =305213701185
External references
- oeis: A193443