Row sums of triangle A049424.

Terms

a(0) =1a(1) =1a(2) =5a(3) =25a(4) =145a(5) =1025a(6) =8245a(7) =72745a(8) =704705a(9) =7424065a(10) =83940805a(11) =1012504505a(12) =12972555025a(13) =175624847425