Row sums of triangle A111553.

Terms

a(0) =1a(1) =2a(2) =9a(3) =60a(4) =509a(5) =5034a(6) =55689a(7) =674624a(8) =8838189a(9) =124199454a(10) =1861297049a(11) =29618273604a(12) =498716980989