Column 6 of triangle A123610.

Terms

a(0) =1a(1) =7a(2) =100a(3) =786a(4) =4420a(5) =19404a(6) =71188a(7) =226512a(8) =644231a(9) =1670015a(10) =4008200a(11) =9009728a(12) =19146090a(13) =38744496a(14) =75117600a(15) =140218218a(16) =253051227a(17) =443056383a(18) =754838884a(19) =1254576400a(20) =2038689796a(21) =3245256396a(22) =5069041432a(23) =7780827600a(24) =11752298725