Row sums of triangle A049352.

Terms

a(0) =1a(1) =1a(2) =5a(3) =33a(4) =273a(5) =2721a(6) =31701a(7) =421905a(8) =6302913a(9) =104270913a(10) =1889862021a(11) =37204038081a(12) =789866524305