Row sums of Bell related number triangle A154380.

Terms

a(0) =1a(1) =2a(2) =6a(3) =20a(4) =72a(5) =276a(6) =1120a(7) =4804a(8) =21796a(9) =104784a(10) =534788a(11) =2901580a(12) =16742440a(13) =102654356a(14) =667519492a(15) =4590552960a(16) =33278208004a(17) =253436345340