Row sums of unsigned triangle A056588.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =32a(5) =132a(6) =692a(7) =4620a(8) =39352a(9) =427572a(10) =5918992a(11) =104375880a(12) =2344751912a(13) =67092113592