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

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =6a(5) =20a(6) =180a(7) =1134a(8) =7980a(9) =78840a(10) =798840a(11) =8620920a(12) =107668440a(13) =1449377280a(14) =20755871136a(15) =323448048000