Row sums of triangle A076731.

Terms

a(0) =0a(1) =2a(2) =7a(3) =30a(4) =146a(5) =852a(6) =5823a(7) =45740a(8) =405844a(9) =4012710a(10) =43733975a(11) =520795002a(12) =6726601062a(13) =93651619880