Expansion of e.g.f.: sech(log(x+1)-tan(x))=1-3/4!*x^4-90/6!*x^6+168/7!*x^7-4095/8!*x^8...

A013245

Expansion of e.g.f.: sech(log(x+1)-tan(x))=1-3/4!*x^4-90/6!*x^6+168/7!*x^7-4095/8!*x^8...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-3a(5) =0a(6) =-90a(7) =168a(8) =-4095a(9) =22176a(10) =-291564a(11) =2834480a(12) =-31372803a(13) =415999584a(14) =-4743336598a(15) =72640890840a(16) =-927946226207

External references