Column k=10 of triangle A257673.

Terms

a(0) =1a(1) =30a(2) =465a(3) =4990a(4) =41820a(5) =292296a(6) =1775075a(7) =9629800a(8) =47604225a(9) =217630430a(10) =930607321a(11) =3755443890a(12) =14405010340a(13) =52827550470a(14) =186123730845a(15) =632552752322