Row sums of triangular table A138612.

Terms

a(0) =1a(1) =6a(2) =22a(3) =63a(4) =139a(5) =277a(6) =481a(7) =785a(8) =1256a(9) =1851a(10) =2688a(11) =3692a(12) =5055a(13) =6731a(14) =8797a(15) =11239a(16) =14175a(17) =17834a(18) =21947a(19) =26701a(20) =32181a(21) =38769a(22) =46002a(23) =54364a(24) =63742a(25) =74455a(26) =86182a(27) =99345a(28) =114094a(29) =130213