Expansion of e.g.f. 1/(1 - 2 * arctanh(x)).

A385470

Expansion of e.g.f. 1/(1 - 2 * arctanh(x)).

Terms

    a(0) =1a(1) =2a(2) =8a(3) =52a(4) =448a(5) =4848a(6) =62912a(7) =952992a(8) =16496640a(9) =321282816a(10) =6952332288a(11) =165489858048

External references