Third right hand column of triangle A163932.

Terms

a(0) =11a(1) =105a(2) =510a(3) =1750a(4) =4830a(5) =11466a(6) =24360a(7) =47520a(8) =86625a(9) =149435a(10) =246246a(11) =390390a(12) =598780a(13) =892500a(14) =1297440a(15) =1844976a(16) =2572695a(17) =3525165a(18) =4754750a(19) =6322470a(20) =8298906a(21) =10765150a(22) =13813800a(23) =17550000a(24) =22092525a(25) =27574911a(26) =34146630a(27) =41974310