Product_{n>=1} (1 + a(n)*x^n/n!) = 1 + arctanh(x).
A353821
Product_{n>=1} (1 + a(n)*x^n/n!) = 1 + arctanh(x).
Terms
- a(0) =1a(1) =0a(2) =2a(3) =-8a(4) =64a(5) =-384a(6) =3968a(7) =-34432a(8) =414720a(9) =-4454400a(10) =68247552a(11) =-912236544a(12) =15949529088a(13) =-245572583424
External references
- oeis: A353821