Sixth column of triangle A067410.

Terms

a(0) =1a(1) =7a(2) =84a(3) =1008a(4) =12096a(5) =145152a(6) =1741824a(7) =20901888a(8) =250822656a(9) =3009871872a(10) =36118462464a(11) =433421549568