Row l=6 of array in A133713.

Terms

a(0) =1a(1) =15a(2) =140a(3) =995a(4) =5901a(5) =30569a(6) =142375a(7) =607700a(8) =2410081a(9) =8972559a(10) =31608089a(11) =106027825a(12) =340416406a(13) =1050541069a(14) =3127340719a(15) =9007681389a(16) =25168555576a(17) =68374424019a(18) =180958790169a(19) =467385754264