Row sums of triangle A285867.

Terms

a(0) =1a(1) =1a(2) =4a(3) =20a(4) =126a(5) =962a(6) =8646a(7) =89546a(8) =1051350a(9) =13811642a(10) =200866326a(11) =3205348346a(12) =55704133590