Ninth column (k=8) of sextinomial array A063260.

Terms

a(0) =3a(1) =27a(2) =125a(3) =420a(4) =1161a(5) =2807a(6) =6147a(7) =12465a(8) =23760a(9) =43032a(10) =74646a(11) =124787a(12) =202020a(13) =317970a(14) =488138a(15) =732870a(16) =1078497a(17) =1558665a(18) =2215875a(19) =3103254a(20) =4286579a(21) =5846577a(22) =7881525a(23) =10510175a(24) =13875030a(25) =18145998a(26) =23524452