Column 5 of triangle A123610.

Terms

a(0) =1a(1) =6a(2) =63a(3) =392a(4) =1764a(5) =6352a(6) =19404a(7) =52272a(8) =127413a(9) =286286a(10) =601203a(11) =1192464a(12) =2252432a(13) =4078368a(14) =7116336a(15) =12018704a(16) =19718181a(17) =31521798a(18) =49228487a(19) =75274584a(20) =112911880a(21) =166423400a(22) =241382700a(23) =344962800a(24) =486301725a(25) =676932006a(26) =931282191a(27) =1267259168