Expansion of e.g.f.: sec(log(x+1)-arctan(x))=1+3/4!*x^4-40/5!*x^5+250/6!*x^6-840/7!*x^7...

A013256

Expansion of e.g.f.: sec(log(x+1)-arctan(x))=1+3/4!*x^4-40/5!*x^5+250/6!*x^6-840/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =3a(5) =-40a(6) =250a(7) =-840a(8) =5145a(9) =-117360a(10) =1667700a(11) =-15263600a(12) =150117275a(13) =-2670166200a(14) =50627578950a(15) =-785508087000

External references