E.g.f.: exp( Sum_{n>=1} x^(2*n) / n^2 ) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!.
A226837
E.g.f.: exp( Sum_{n>=1} x^(2*n) / n^2 ) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =380a(4) =14980a(5) =969192a(6) =94438344a(7) =13027041456
External references
- oeis: A226837