Expansion of e.g.f. tan(tan(x) * log(x+1)).

Terms

a(0) =0a(1) =0a(2) =2a(3) =-3a(4) =16a(5) =-50a(6) =560a(7) =-4116a(8) =49376a(9) =-495648a(10) =6643648a(11) =-86408080a(12) =1355660480a(13) =-21635261856a(14) =389870008320