a(n) = n! * [x^n] exp(n*arctanh(x)).

A293193

a(n) = n! * [x^n] exp(n*arctanh(x)).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =33a(4) =384a(5) =5745a(6) =105120a(7) =2273985a(8) =56770560a(9) =1606455585a(10) =50810457600

External references