E.g.f.: (1-exp(x))*log(2-exp(x)).

Terms

a(0) =0a(1) =0a(2) =2a(3) =9a(4) =40a(5) =215a(6) =1446a(7) =11893a(8) =115844a(9) =1302099a(10) =16568290a(11) =235237937a(12) =3684998208a(13) =63113398543