Eighth column (and diagonal) of Narayana triangle A001263.

Terms

a(0) =1a(1) =36a(2) =540a(3) =4950a(4) =32670a(5) =169884a(6) =736164a(7) =2760615a(8) =9202050a(9) =27810640a(10) =77364144a(11) =200443464a(12) =488259720a(13) =1126753200a(14) =2478857040a(15) =5226256926a(16) =10606227291a(17) =20796524100a(18) =39525557500a(19) =73018266750a(20) =131432880150a(21) =231003243900a(22) =397179490500a(23) =669161098125