Column 4 of triangle in A144505.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =20a(7) =330a(8) =5495a(9) =97405a(10) =1867446a(11) =38849790a(12) =875734035a(13) =21320230140a(14) =558453090910