Row sums of A259701 except first column.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =9a(6) =21a(7) =78a(8) =199a(9) =699a(10) =1889a(11) =6491a(12) =18261a(13) =62145a(14) =180091a(15) =610220a(16) =1809045a(17) =6118849a(18) =18469079a(19) =62440111a(20) =191235803a(21) =646681908a(22) =2004592956a(23) =6782895492a(24) =21239394216a(25) =71925883149a(26) =227169634741a(27) =769998727785