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

A331618

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

Terms

    a(0) =1a(1) =1a(2) =3a(3) =15a(4) =97a(5) =785a(6) =7523a(7) =83615a(8) =1053281a(9) =14838177a(10) =230832867a(11) =3929944623a(12) =72633052545

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