E.g.f. A(x) satisfies A(x) = exp( x*((A(x) + A(-x))/2)^2 ).
A385687
E.g.f. A(x) satisfies A(x) = exp( x*((A(x) + A(-x))/2)^2 ).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =7a(4) =25a(5) =341a(6) =2161a(7) =44115a(8) =404209a(9) =11010025a(10) =132273601a(11) =4508793983a(12) =67085545033
External references
- oeis: A385687