Row sums of A107111, viewed as a number triangle.

Terms

a(0) =1a(1) =2a(2) =5a(3) =15a(4) =54a(5) =228a(6) =1106a(7) =6069a(8) =37212a(9) =252287a(10) =1873928a(11) =15127191a(12) =131788320a(13) =1231650843a(14) =12283477562a(15) =130137706957