Row sums of triangle A049411.

Terms

a(0) =1a(1) =1a(2) =6a(3) =36a(4) =246a(5) =2046a(6) =19716a(7) =209616a(8) =2441916a(9) =31050396a(10) =425883816a(11) =6244077456a(12) =97391939976