Expansion of e.g.f.: sec(arctan(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+90/6!*x^6-420/7!*x^7...

A012406

Expansion of e.g.f.: sec(arctan(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+90/6!*x^6-420/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =12a(5) =-60a(6) =90a(7) =-420a(8) =21728a(9) =-270144a(10) =1479240a(11) =-9807600a(12) =330821832a(13) =-6651092448a(14) =71604108576a(15) =-744095308320

External references