Expansion of 1/cos(log(1+x)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =-3a(4) =16a(5) =-100a(6) =760a(7) =-6720a(8) =67940a(9) =-772560a(10) =9760100a(11) =-135617900a(12) =2055532400a(13) =-33748556400a(14) =596675513200