sec(exp(x)-cos(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+120/5!*x^5...

A013320

sec(exp(x)-cos(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+120/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =1a(3) =6a(4) =21a(5) =120a(6) =1077a(7) =8918a(8) =83097a(9) =952560a(10) =11790649a(11) =156839430a(12) =2318954253a(13) =37207496040a(14) =637980683277

External references