Expansion of e.g.f.: sech(arctanh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6...

A012708

Expansion of e.g.f.: sech(arctanh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-12a(5) =60a(6) =-570a(7) =3780a(8) =-29568a(9) =169344a(10) =-557160a(11) =-13049520a(12) =375064008a(13) =-7823848032a(14) =135678667488

External references