Row sums of triangle A091063.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =66a(6) =346a(7) =2229a(8) =17000a(9) =148898a(10) =1465364a(11) =15957314a(12) =190158712a(13) =2459041744a(14) =34278016954a(15) =512253587397