Expansion of e.g.f. log(1-x) * tan(log(1-x)/2).

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =12a(5) =60a(6) =362a(7) =2562a(8) =20820a(9) =191088a(10) =1955020a(11) =22061380a(12) =272197160a(13) =3645227040a(14) =52656804440a(15) =816114251400