Fourth column of triangle A067410.

Terms

a(0) =1a(1) =5a(2) =40a(3) =320a(4) =2560a(5) =20480a(6) =163840a(7) =1310720a(8) =10485760a(9) =83886080a(10) =671088640a(11) =5368709120a(12) =42949672960a(13) =343597383680