exp(sec(x)*arctan(x))=1+x+1/2!*x^2+2/3!*x^3+5/4!*x^4+40/5!*x^5...

A012801

exp(sec(x)*arctan(x))=1+x+1/2!*x^2+2/3!*x^3+5/4!*x^4+40/5!*x^5...

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =40a(6) =205a(7) =576a(8) =2473a(9) =46208a(10) =475385a(11) =1293184a(12) =-2814227a(13) =309637120a(14) =5900398725a(15) =5786437632a(16) =-532397600303

External references